20. The bulletproof vest was
created by a Polish inventor
called Jan Szczepanik in 1901.
21. In 1853, Ignacy Łukasiewicz found a way to distill a substance
called kserone (or parrafin) from oil. Łukasiewicz also
introduced first modern street lamps in Europe and created first
oil refinery.
23. It was developped by two Polish lieutenants –
Józef Kosacki and Andrzej Garboś at the end
of year 1941.
24. German military messages enciphered on the Enigma
machine were first broken by the Polish engineers.
Cryptanalysis of the Enigma enabled the western Allies
in World War II to read substantial amounts of secret
Morse-coded radio communications.