1.
Prof C Sinha
Honorary Secretary, ICS
&
Department of Chemistry,
Jadavpur University,
Kolkata, India
Nation BuildingPlanof Archarya P. C. Ray
“It is difficult to believe that
the man in simple Indian dress
wearing simple manners could
possibly be the great scientist
and professor.” Gandhiji

2.
Sl
No
Research Scholar Year Title of Major work No. of
publications
1 Sri Jatindra Nath Sen 1903 Thermal studies on Mercurious Nitrite 1
2 Sri Atul Chandra
Ganguli
1905-
1907
Thermal studies on Hyponitrous acid,
Hyponitrites and Nitrites of Silver & Mercury 3
3 Sri Panchanan Neogi 1906-1907 Alkyl Sulphates, Nitrites & Nitro compounds 2
4 Sri Nagendra Nath
Sen 1909 Phosphorus & Arsenic compounds 1
5 Sri Atul Chandra
Ghosh 1910
Thermal studies on Dimercurammonium
nitrites 1
6 Sri Satish Chandra
Mukherjee 1910 Cryoscopic studies on ionisation of nitrites 1
7 Sri Jitendra Nath
Rakshit
1911-
1913
Organo nitrite derivatives preparation, reaction
& physiochemical study 10
8 Sri Hemendra
Kumar Sen 1911
Thermal studies on organo Hyponitrite
derivaties 1
9
Sri Rashik Lal Dutta 1911
Organo nitrites: preparation, reactivity,
physical studies & thermal decomposition 2
10
Sri Nil Ratan Dhar
1912-
1913
Electrical Conductance behaviour of Mercury
alkyl chlorides and nitrites 3
11
Sri Tincowry De 1912
Physiochemical studies on ammonium
nitrite & organo nitrites 2
12
Sri Rajedra Lal De 1913-
Physiochemical studies on alkali & alkaline earth
metal nitrates 2
13 Sri Sarat Chandra
Jana 1913
Physiochemical studies on ammonium
nitrate, benzoate and acetate 1
14 Francis Vito Fernandes 1914 Organo thio-compounds 1
15
Sri Manik Lal De 1916-17
Physiochemical studies of nitrous acid
synthesis of organo Thio-compounds 3
16 Sri Jnanendra Chandra
Ghosh 1917
Physiochemical studies on ionization
of nitrious acid 1
17 Sri Prafulla Chandra
Guha 1919
Mercury mercaptide nitrates and related
compounds: preparation and reactivity 4
18 Sri Radha Kishen
Das 1919 Organo thio- compounds 1
19 Sri Kali Kumar
Kumar 1921
Physiochemical studies on sulfonium
compounds 1
20 Sri Gopal Chandra

3.
21 Sri Prafulla Kumar Bose 1923 Mercaptans 1
22
Sri Kshitish
Chandra
Boseray
1925-
1929
Platinum group metals Chemistry, Varying
valency of platinum, Organo sulphur
compounds, Double Sulphates of Cu, Mg
& Phosphonium bases 9
23 Sri Biresh Chandra
Guha 1926
Condenced heterocycles and Varying valency of
platinum 3
24
Sri Nirmalendu
Nath
Ray
1927-
1929
Double Sulphates of Cu Mg compound
Phosphonium bases & Organo phosphonium
nitrites 1
25 Sri Purna Chandra
Mukherjee 1929
Platinum and gold complexes with
organo thiocompounds 1
26 Sri Sushil Kumar Mitra 1929 Organo sulphur compounds 1
27 Sri Dinesh Chandra
Sen 1930
Gold complexes with Organo sulphur
compounds 1
28 Sri Nadiabehari
Adhikari
1930-
1934
Alkyl sulfonium compounds with mercury, antimony,
silver, zinc, cadmium & Iridium complexes with organo
sulphur compounds, amines, ammonia 8
29 Sri Sailesh Chandra
Sengupta
1930-
1933
Variable valency of
platinum 2
30 Sri Amerandra Nath
Ray 1931
Alkyl sulfonium compounds with
mercury, antimony 2
31 Sri Harendra Nath
Ray 1931
Organo sulphur
compounds of silver 1
32 Sri Sanat Kumar
Banerjee 1931
Alkyl sulfonium compounds with zinc,
cadmium 1
33 Sri Nripendra
Nath
Ghosh 1933
Varying valency, platinum group metal
complexes with organo sulphur
compounds, organothio-compounds 5
34 Sri Sushil Kumar
Mitra 1933
Organo thio-
compounds 1
35 Sri Pulin Behari
Sarkar 1933
Fluorination of
organic compounds
1
36 Sri Amit Roy 1933 Fluorination of organic compounds 1
37 Sri Harish Chandra
Goswami 1935
Fluorination of
organic compounds 1
38 Sri Anil Chandra Fluorination of

4.
Illustrious Students :
J. C. Ghosh (Bara Jnan), Director, IIT KGP, IISc, Vice-Chancellor, C. U.
J. N. Mukherjee , Founder of Colloid Chemistry, Director, ICAR, New Delhi, Soil Chemistry.
Nilratan Dhar: Founder of Physical Chemistry Research in India, Founder of Chemistry Dept of University of Allahabad.
B. C. Guha, Founder of Biochemistry Research in India
P. Ray, P. B. Sarkar, Gopal Chandra Chakraborty, Janandranath Roy, Prafulla Chandra Guha, Prafulla Kumar Sen,
Maniklal De, Radhakishen Das, Kalikumar Kumar, Khiitsh Chandra Basu, Nirmalendunath Ray, Nadia Behari Adhikari,
Sachindranath Roychowdhuri, Susil Kumar Mitra, Purna Chandra Mukherjee, Dinesh Chandra Sen, Sailesh Chandra
Sengupta, Amarendranath Ray, Harendranath Ray, Sanat Kumar Banerjee, Nripendra Nath Ghosh, Ranjit Ghosh, Amit
Ray, Harish Chandra Goswami, Anil Chandra Roy
M. N. Saha, S. N. Bose
“His Laboratory is the Nursery from which issue forth the young chemists of new India -
--“ Journal Asiatique, 1908

5.
Acharya Prafulla Chandra with his colleagues at the Calcutta
University. Seated at the extreme right is Satyendra Nath Bose, and
standing to the extreme left is Meghnad Saha.

6.
Dr. Nilratan Sarkar
J. C. Ghosh
Director, IIT-KGP, IISc,
Vice-Chancellor, C. U.
Dr. B. C. Guha
Founder of Biochemistry in India
Prof. S. S. Bhatnagar
Founder Director of CSIR
Prof. B. B. Dey, Professor of Chemistry,
Madras Presidency College (student of
Acharya). His famous students are: Prof.
T. R. Seshadri, T. Venkataraman
Prof. S. S. Bhatnagar, Sir J. C. Ghosh,
Prof. J. N. Mukherjee worked with Prof.
F. G. Donnan, students of AAcharya Ray.
SSBhatnagar at BHU, Lahore, Delhi
J C Ghosh at Dacca, Kharagpur,
Bangalore
J. N. Mukherjee, Calcutta, Pusa, ICAR,
New Delhi
“---grand pupil of his (Sir P. C. Ray),
having received instruction in
Chemistry from the late Mr. Atul
Chandra Ghosh, one of his earliest
pupils---“

7.
Alexander Pedler,
Presidency College
Alexander Crum Brown
Edinburgh University
In Edinburgh University Ray did B. Sc. In
Chemistry, Botany and Zoology. B. Sc.In
1885.
Worked with Prof. A. Crum-Brown, FRS, HOD,
Chemistry, Edinburgh University. Thesis
entitle “Conjugated Sulphates of the Copper-
magnesium Group: A Study of Isomorphous
Mixtures and Molecular Combinations”. He
received D. Sc. In 1887.
Prafulla Chandra in early youth.
P. C. Rây, Proc. Roy. Soc.
Edinburgh, 1888, 267
J. Asiatic Soc. Bengal, 1894, 1, 59 .

8.
Nature wrote (15th August, 1912) “Prof. P. C. Ray has added to
his success in preparing ammonium nitrite in a tangible form, a
further accomplishment in determining the vapour density of
this fugitive compound.”
When he presented this work during his third visit to Europe in
from of many illustrious scientists including Sir William
Ramsay, NL he had been warmly congratulated for this work.
This reaction presented by experiment in Chemical Society, London meeting in presence of famous chemist William Ramsay. Nature
published this report in August 15, 1912
NH4Cl + AgNO2 NH4NO2
heating
N2
+ H2O
N
O
O
M
M N
O
O
O N
O M
a) b) c)
N
O
O
Hg Hg N
O
O
O N
N O
Coordination modes of NO2
-
to metal
Mercurous nitrite
Hyponitrite anion
PUBLICATIONS:
P. C. Rây, J. Asiatic Soc. Bengal, 1896, 65, 1.; Z. anorg. chem.,
1896, 12, 365. J. Chem. Soc. Trans., 1897, 71, 337. J. Chem. Soc.
Trans., 1903, 83, 491. J. Chem. Soc. Trans., 1908, 93, 997. J.
Chem. Soc. Trans., 1909, 95, 66. J. Asiatic. Soc. Bengal, 1900, 69,
476. Proc. Chem. Soc., 1905, 21, 278. J. Chem. Soc. Trans., 1906,
89, 1900. J. Chem. Soc. Trans., 1905, 87, 171.

9.
“The Journal of the Asiatic Society Bengal can
scarcely be said to have a place in our chemical
libraries; the current number, however, contains a
paper by Dr. P. C. Ray, of the Presidency College,
Calcutta on Mercurous Nitrite, that is worthy to
note.---“, Nature, (1896)
“But the existence of Mercurous Nitrite has been disproved
many years later------. An estimate of enthalpy of formation
of authentic Mercurous Nitrite, based on thermochemical
data ---, shows this is to highly endothermic which accounts
for its non existence---“ J. Indian Chem. Soc, 2011, 88, 1065-
1092

10.
Early Research in Presidency College:
He started first analyzing the quality of food materials sold in Calcutta
market. Mustard oil, ghee, milk, butter etc were analysed and they
were found to be adulterated. This work was published in the Journal
of the Asiatic Society of Bengal, 1894.
Title: Analysis of Indian Food Materials (First part: Fat and Oil).
Prof. Jyoti Bhusan Bhaduri, MA, PRS approached Acharya Ray for pure
calomel, Hg2Cl2 required for reference standard in electrochemical
cell. Acharya Ray prepared it
Hg + HNO3 (25% acid) followed by addition of HCl might prepare
Hg2Cl2.
During reaction he say deposition of yellow crystal and analysed the
composition as mercurous nitrite, Hg2(NO2)2
Subhas Samanta, Sreebrata Goswami & Animesh Chakravorty*, “On mercurous nitrite and a basic mercurous
nitrate derivative” , Indian Journal of Chemistry, Sec-A, 2011, 50A, 137
A. Chakravorty, Resonance, 2001, 6, 3.
A. Chakravorty, Indian J. History Sci., 2014, 49, 361.

11.
The decade of 1860-69 the nineteenth century was very important in India’s
history. Thus, Animesh Chakravorty, a well-known inorganic chemist,
wrote : “It was the best of times – the second half of the nineteenth century.
The decade of 1860-69 alone saw the birth of Rabindranath Tagore, Motilal
Nehru Swami Vivekananda, Madan Mohan Malaviya, Asutosh
Mookerjee,Lala Lajpat Rai, Srinivasa Sastri and Mohandas Karamchand
Gandhi. And of Prafulla Chandra Ray. A season of light and hope was
descending on a languishing India.”
Because of his learning, devotion to chemistry and inordinate affection for
his pupils, able young chemists joined him in Inorganic and Analytical
Chemistry as well as in Physical and Organic Chemistry. Thus, he became
the architecture of the first flourishing School of Chemistry in India
7th Indian Science Congress: Sir P. C. Ray, General President, 1920 at Nagpur deliberation on ‘Dawn
of Science in Modern India’. P. C. Ray was second Indian to Preside over ISCA.
ISCA started in 1914, 1st President Hon. Justice Sir Asutosh Mookerjee

12.
The Indian Chemical Society
The Indian Chemical Society, a premier Scientific Society of India, was founded in 1924. Acharya P. C.
Ray was the founder President of the Society. J. N. Mukherjee, J.C. Ghosh and S.S. Bhatnagar while
carrying out their research work in the University College, London in 1919 for the D.Sc. Degree, took a
decision that after coming back to India their endeavor would be to establish a Chemical Society like the
Chemical Society of London. Their cherished dream was transformed into a reality with active
cooperation of many of the leading personalities in the country, and the Indian Chemical Society was
founded on May 9, 1924, as a registered Society, with Sir Prafulla Chandra Ray, the doyen of Indian
Chemists, as the first President. Many of the distinguished personalities in the field of Chemical Science
of that time in India took active interest in nurturing the new born Society.

13.
The first issue of the quarterly Journal of the Indian Chemical Society appeared
in November 1924 and this received appreciation from several leading
organizations and personalities of other countries. Professor Wynne, the then
President of the Chemical Society, London, cabled to Sir P. C. Ray
congratulating the Indian Chemical Society for this venture. The following
report published in the renowned journal “Nature (London)” was revealing:
“The great work in chemistry which has occurred in the Indian Empire
during the past ten years, had lead to the establishment of an Indian
Chemical Society, the first number of the quarterly journal of the
Society has now appeared. There are thirteen papers, and only one of
these is published under the English names. The remaining papers are
published by Indians and come from all parts of the Indian Empire.
Four of these emanate from the College of Science, Calcutta, and this
is as it should be, because for many years past, this Institution has
been the back-bone of chemical research in India.”

14.
Published by Elsevier (2021`)

15.
Education in Chemical Science and Technology, 2013-

16.
Some of the Genius of Ancient India
BHASKARACHARYA II
(1114-1183 CE)
ACHARYA KANAD
(600 BCE)
NAGARJUNA (100 CE) ACHARYA SUSHRUT
(600 BCE)
VARAHAMIHIR
(499-587 CE)
ACHARYA BHARADWAJ
(800 BCE)
ARYABHATT
ACHARYA KAPIL
(3000 BCE)
Nagarjuna, “father of iatrochemistry” had explained the circulatory system and blood tissue. He worked on the benefits of specifically
treated minerals known as bhasmas.

17.
The iron pillar of Delhi (375–413
CE). The first iron pillar was the
Iron pillar of Delhi, erected at the
times of Chandragupta II
Vikramaditya.The Iron Pillar
located in Delhi, India, is a 7 m
(23 ft) column in the Qutb
complex, notable for the rust-
resistant composition of the metals
used in its construction.

18.
Einstein: We should be thankful to the
Indians who taught us how to count, without
which no worthwhile scientific discovery
would have been possible.
The iron pillar of Delhi (375–413
CE). The first iron pillar was the
Iron pillar of Delhi, erected at
the times of Chandragupta II
Vikramaditya.The Iron Pillar
located in Delhi, India, is a 7 m
(23 ft) column in the Qutb
complex, notable for the rust-
resistant composition of the
metals used in its construction.

19.
Struggle for Swatantrata : Best
weapon is Science
Sir P. C. Ray was a chemist by
profession and an industrialist by
inclination ; but his heart always
remained with the people and the
country. True spirit of nationalism
pulsated through every fibre of his
brain and body. He has served his
country with head and heart. His
head was big but his heart was
bigger. Though Acharya Ray
achieved fame far and wide as a
great teacher, chemist, research
worker and an exponent of
industries, but his name is more
familiar throughout India as a true
philanthropist, patriot and social
worker. He gave away his all for
the poor and suffering humanity.

20.
Royal Institution, London, 1897
Radiowave receiver 5 mm
The waveguide
Double-prism attenuators

21.
An emotional Bose, during the inauguration of the Bose Institute
(Basu Vigyan Mandir) in 1917 (six years after Nivedita’s death),
said, “In all my struggling efforts, I have not been altogether
solitary. While the world doubted, there have been a few, now in
the city of silence, who never wavered in their trust.” In one of his
letters he wrote, “Sister Nivedita was also greatly interested in
the revival of all intellectual advances made by India, and it was
her strong belief in the advance of Modern Science
accomplished by Indian Men of Science that led me to found my
Research Institute.”

22.
J.C Bose with his students : Back Row - N.C. Nag, J.C.
Ghosh, J.C. Bose, M.N. Saha, S. Dutta; Front row - N.R. Sen,
J.N. Mukherjee, S.N. Bose, D.M. Bose (1928)
Presidency College (1907)

23.
Sir Stafford Northcote,
Rector, Edinburagh University
In the essay PCR analysed economic state of East India
Company ruled India from Robert Clive to Lord Mayo.
Within this period 15 Governors ruled India.
Robert Clive Lord Mayo
* In 1857 the ‘Public debt’ of India : £60,000,000
**In 1863 the Public Debt increased to £110,000,000
Every Year India sent Silver to UK of worth Rs. 1.2 Cr
Mangal Pandey fired the first bullet in The
First War of Independence
Sepoy Mutiny : 1
st
Indian Revolt in 1857

24.
Acharya P C Ray consulted original Sanskrit literature with help of Acharya B. N. Seal and
Rasendrasara Samgraha, Rasaratnakara, Rasahridaya, Kakachandesavarimata, Rasaprakasasudhakara,
Rasakalpa, Rasaratnasammuchaya, Rasarajalakshmi, Rasanakshatramalika, Rasaratnakara,
Dhaturatnamala, Rasapradipa, Dhatumanjari, Subarnatantra and different Tibetean texts.
Rasahrdayatantra by Govind Bhagwatpad; Rasaratnakara by Siddha Nityanatha; Rasarnava by an
unknown author; Rasendracudamani by Somadeva; Rasaratnasamuccaya by Vagbhatta;
Rasaprakasasudhakara by Yasodhara; Rasarajalaksmi by Ramesvara Bhatta; Rasendracintamani by
Dhundukanatha; Rasendracintamani by Ramacandra Guha; Rasasara by Govind Acarya;
Rasakaumudi by Sarvajnacandra; Rasabhesajakalpa by Surya Pandita; Rasasamketakalika by
Camunda; Lohapaddhati by Suresvara; Kankaligrantha by Nasirshah; Rasamuktavalina by Devanatha.
Besides, there are several works whose authorship and dates have not yet been established. Among
them may be mentioned Dhatukalpa, Dhatumanjari, Dhatumaranam, Rasagrantha, Rasakalpalata,
Rasanibhandha, Suvaranatantra, Tamrakalpa, Abhrakakalpa, Paradakalpa, Jaranamaranadi,
Sutapradipa etc.

25.
Ancient India was advanced in all the fields of Science & Technology, Health and Culture. Why
we Indian are going down?
Acharya Ray identified three causes behind this.
1.The caste system.
“The caste system was established de novo in a more rigid form. The drift of Manu and of the
later Puranas is in the direction of glorifying the priestly class, which set up most arrogant and
outrageous pretensions”, wrote Acharya Ray.
On the issue of casteism, he wrote “Are we humans? All those haris, doms, chamars, malis,
bagdis,-- —who live like animals around your house in the darkness of ignorance— what have
you done for them over the centuries? You do not touch them, do not allow them to come close,
you drive them away like dogs. You can take your pet dog on your lap, but if the healthy child of a
cobbler crawls up your stairs, you roar in the name of your caste and religion. --- If a chamar
comes to our door begging for food, it is true that we have not always shooed him away, we have
given him food, but before that we have told him a thousand times: you are a cobbler, an
untouchable, go away and wait under a tree in the garden—when we are through with eating you
will get the leftovers. This way we have trodden millions of Indians under our feet for centuries.”
He was too hard : “In our country, we need 500 stoves for 500 Congress delegates. Even that is
not enough; the delegates from Madras would talk of sight-pollution: If a man from a lower caste
looks at the cooked food of a Brahmin, the food becomes polluted. Would these pundits tell me if
the food will become polluted if one looks from a distance with a telescope?”

26.
2. Following of code conduct as per Manu, Naya Sastras
The reason for the decline of the rich culture of medicine and surgery (of Charaka and Susruta
tradition), according to Acharya Ray, was the introduction of the code of conduct by Manu.
Acharya Ray wrote, “According to Susruta, the dissection of dead bodies is a sine qua non to the
student of surgery and his high authority lays particular stress on knowledge gained from
experiment and observation. But Manu would have none of it. The very touch of a corpse,
according to Manu, is enough to bring contamination to the sacred person of a Brahmin. Thus we
find that shortly after the time of Bhagavata, the handling of a lancet was discouraged, and
anatomy and surgery fell into disuse and became to all intents and purposes lost sciences to the
Hindus.”
3. MAYA-BAD – Samkara Philosophy
The third reason identified by him was the spread of the Vedanta philosophy among the educated
section: “The Vadanta philosophy, as modified and expanded by Samkara, which teaches the
unreality of the material world, is also to a large extent responsible for bringing the study of
physical science into disrepute.”
Science asks questions about the material world, and seeks the answers. Acharya Ray felt that if
one believes that the material world itself is unreal or “MAYA”, it is impossible for him to harbour
curiosity about it, let alone seeking truth about it.

27.
Nationalistic movement
With the help of Ghokhle APCR met Mahatma Gandhi and
arranged a public meeting in Albert Hall, Calcutta. Gandhiji first
time met intellectuals of Kolkata in 1st January, 1902 and
delvered his experience in South Africa. President : Mr.
Narendra Nath Sen, Editor, Indian Mirror
Raja Peary Mohan Mukherji, Mr. Bhupendra Nath Basu,
Mahadev Govinda Ranade Dadabhoy Naoroji
APCR commented “The National Congress used to be designed
as “a three days’ picnic’ in the Christmas Holidays.” (p-125,
LEBC, Biography)

28.
1905
Greatly known for Partition of Bengal, bill passed by Lord Curzon. APCR was vocal against partition. Kobiguru, APCR other
intellectuals of Bengal was against this bill and they joined movement against Partition Bill on 16/10/1905. Kobiguru arranged
‘Rakhi Bandhan Utsav’ and ‘No Cooking (Arandhan)’ for all.

29.
1906
Against partition, intellectuals of Kolkata met and formed the National Council of Education, Bengal (NCE-Bengal) in 1906.
Aravinda Ghosh, Asutosh Chaudhuri, Bepin Chandra Pal, Brajendra Nath Seal, Chitta Ranjan Das, Devaprasad Sarvadhicary, Gaganendra Nath Tagore, Girish
Chandra Bose, Hem Chandra Sen, Heremba Chandra Maitra, Jogesh Chaudhuri, Dr. Nilratan Sarkar, Raja S. C. Mullick, Rabindranath Tagore
Bengal Technical Institute was started to operate since July, 1906 “A
close link with the contemporary upsurge of economic swadeshi is
indicated by the emphasis laid in the course of studies on training in
ceramics, dyeing, soap-making, tanning and candle and match
manufacture.”
Acharya Ray was the President of NCE-
B for two decades, 1924-1944.

30.
Gandhi’s Salt March to Dandi, On March 12, 1930,
Gandhi and approximately 78 male satyagrahis set out, on foot, for the coastal village of Dandi some 240 miles from
their starting point in Sabarmati, a journey which was to last 23 days
On the night of May, 4 Gandhi was sleeping in a cot under a mango tree, at a village near Dandi. Several ashramites
slept near him. Soon after midnight the District Magistrate of Surat drove up with two Indian officers and thirty heavily-
armed constables. He woke Gandhi by shining a torch in his face, and arrested him.
The effects of the salt march were felt across India. Thousands of people made salt, or bought illegal salt. This period
is to be considered the apex of Gandhi’s political appeal, as the march mobilized many new followers from all of Indian
society and the march came to the world’s attention. After Gandhi’s release from prison he continued to work towards
Indian independence, which was achieved in August, 1947. Dandi was a key turning point in that struggle.

31.
The Bengal Salt Co.

32.
Chairman of National School (1924) : Acharya Ray; Secretary : Subhas Chandra Bose
Acharya Ray visited Kalagachia National School, Medinipur. He travelled by Train, then Boat and then 38 km by walk at the age of 73 on 15
th
January,
1924. School was founded by Zaminder Mr. Jagadish Ch Maity. Now this school’s name is Jagadish Vidyapith.
Acharya Ray spend four days, delivered speeches, taken classes, met the guardians etc.
He declared “—The students of National School are open minded. In the Govt Schools the students are looking photos of King and Queen while in
the National Schools the students are devoting to the portrays of half-necked Mahatmaji . They (Govt. School) have to cover the truth and in the
National School the students discover the ‘Truth’ in the history. --- The students (National School) know well to sacrifice; they come forward as
volunteer during any natural calamity like draught, flood, malaria etc.”
In the British Education our students have lost their wider outlook; they are becoming narrow minded.

33.
Gandhi’s Salt March to Dandi, On March 12, 1930,
Gandhi and approximately 78 male satyagrahis set out, on foot, for the coastal village of Dandi some 240 miles from their starting point in Sabarmati, a journey which
was to last 23 days
On the night of May, 4 Gandhi was sleeping in a cot under a mango tree, at a village near Dandi. Several ashramites slept near him. Soon after midnight the District
Magistrate of Surat drove up with two Indian officers and thirty heavily-armed constables. He woke Gandhi by shining a torch in his face, and arrested him.
The effects of the salt march were felt across India. Thousands of people made salt, or bought illegal salt. This period is to be considered the apex of Gandhi’s political
appeal, as the march mobilized many new followers from all of Indian society and the march came to the world’s attention. After Gandhi’s release from prison he
continued to work towards Indian independence, which was achieved in August, 1947. Dandi was a key turning point in that struggle.

34.
The Bengal Salt Co.

35.
Bengal Salt Company Limited , established on 06 July 1934 by Mr. Manj
Datta, disciple of Acharya P C Ray at Dadanpatrabar, Medinipur. Acharya Ray
at the age of 80 spend 15 days at this place to train and take care of salt
production, purification and to inspire nationalistic self-reliance of the
country.

36.
Productions: Hiracaus (FeSO4
7H2O used as medicine against
Anemia) using scrap iron
Organic Glycerine soap, Talcom
Powder, Tooth paste, Phenyl,
Carbolic Acid, Fire Extinguisher,
Surgical Instrument, Hospital
Materials, Epidrin, Santonin,
Stricnin, Ferri-Iodide, Liq.
Arsenicelis, Yoan, Basak, Kurchi,
Kalmegh Cafin etc extracts.
The indigenous drugs made at
Bengal Chemical were displayed
at the exhibition of Indian Medical
Congress held in Calcutta in 1898.
Doctors from different parts of
India attending the Congress were
attracted to these indigenous
drugs.
1892 – BCPW; 1893 – Sulfuric Acid Plant, Phosphate Plant
1934 : Khulna Cotton Mill; 1935 : Bengal Initiative
1938 : Indian Chemical Manufacturing Association
Bangasree Cotton Mill, Hindustan Inurance Co., Bengal Potteries, Bengal Enamel, Tannery
Works, Chakravorty & Chatterjee Publications, Markentine Marine Co.
He initiated Transports on Rivers and British Govt skill fully damaged his plan and he lost
more than Rs, 2,00,000/-

37.
Donations
In his Science College days 8/10 students always with him and he maintained their livelihood. He had spent half-of the
pension for students welfare. His Pension was Rs. 800/- pm
1918 – Establishment of Bager Hat College and purchase of 50 acres land for establishment of Agriculture University
1921 – To establish Biological Dept and over all growth of Science College, C. U., donated Rs. 1,80,000/-
1921 : Fellowship to carry out research in Science College @ 200/- per month
1022 – Nagarjuna Award to the Researcher of CU he donated Rs. 10,000/-
1922- Khadi Cotton Industry & Charaka – donated Rs. 50,000/-
1922 – Kathipara Sevashrama Sangha donation Rs. 1000/-
1924 : Establishment of Indian Chemical Society, donation to CU – Rs. 10,000/-
1927 – Jassore-Khulna Sammilani, Rs. 10,000/-
1936 – To mark his respect to Sir Ashutosh Mookherjee he donated Rs. 10,000/- for an Award after his demise
1936 _ Jotish Ch Ray Institute of Medical Research, Rs. 5000/-
1936 – Widow and poor women welfare fund Rs. 56,000/-
1936 – Lady Abala Basu Vidyalayas @ 400/- per month
1936 – Abhayashram of Mr. Prafulla Ch Ghosh, Congress leader & Student, Rs. 3000/-
He ate a couple of bananas everyday. One day a student of his, Nadia Bihari, saw some very good bananas in the
market, and bought a few him. Professor Ray was very glad to see such healthy bananas. But when he learned that they
cost three paisas a piece instead of one paisa as usual, he got very angry, and slapped the student. The student thought
the teacher as a very miserly man. A few minutes later he had a visitor, Dr. Prafulla Chandra Ghosh, who asked for help
to run an orphanage. Acharya Ray asked Nadia Bihari to write a cheque of Rs. 3000, signed it, and gave it to Dr. Ghosh.
The man who would not spend two extra paisas for himself had no hesitation in giving Rs. 3000 for charity!
He did not received any salary from CU when he crossed 60 Yrs (1921) for 15 years when he fully retired (1975). Salary
of Palit Professor was Rs. 1000/-. His Pension was 800/-.

38.
CONCLUSION
At the reception on Prafulla Chandra’s 70th birth anniversary organized in 1932 by the Corporation of
Calcutta and the leading elites of the day, Rabindranath said in his presidential address:
“It says in the Upanisads that the Supreme one wanted to be many. The urge of self-disposal is at the
root of creation. It was through this kind of creative urge that Prafulla Chandra became many in the
minds of pupils by diffusing and thereby reactivating himself in many younger minds. But this would
hardly be possible unless he had the capacity to give himself fully to others.”
Prafulla Chandra was a great nationalist and a dedicated patriot par excellence.
Gandhi said : “Great he undoubted is: But goodness from Indian stand point is greater than
greatness and Acharya Ray is even more good then he is great. And it is his goodness—his
childlike simplicity, his suavity of manners, his ready accessibility, his unblemished purity,
unostentious charity, his voluntary poverty with plain living and high thinking, his enthusiasm
and optimism, his innate spirit of self-denial, his incurable habit of always taking a back seat, his
sturdy independence, his inflexible incorruptibility…in a word, his nobility of nature made him
idol of the people. Service and sacrifice were his watch-word…” (70th Birthday Volume)

39.
International Chemical Landmark Plaque

40.
University College of Science & Technology founded
on March 27,1914, by the great visionary Sir Asutosh
Mukherjee, the then Vice Chancellor of the University of
Calcutta

41.
Museum in the Department of Chemistry,
University of Calcutta

42.
He is an example of “plain living and high thinking”. When he was earning Rs. 800/-
pm as HOD, Chemistry, Presidency College, he did not spend more than 250/- pm for
his personal expenses. He distributed Rs. 400/- pm to needy students studying in
colleges in Calcutta.