1. VERNIER
A vernier, also king's called foot, is a similar measuring device, in the form, to a key stillson,
he serves to measure with medium-sized precision up to 128 of inch and up to(even) ten-
thousandth of meter(subway), more or less it works this way, first you do
an approach of the measurement with the zero (be already of inches or
CMS), if the zero stays exactly in a rayitas, this is the exact measurement,
if not, you have to do which(who) of the following rayitas coincides exactly
and this measurement you have to add it to brought near to the zero (next
low(lower), not next top), in the inches every rayita to the right of the zero
is equivalent to 1/128, in case of the CMS. every rayita is equivalent to 1/10000 of
meter(subway) or a tenth of Mm).