meters, and voltmeters. The ing operations, it was necessary to remove, among is to be used where the above operations are carried mercury lamps were started by means of kicking coils other buildings, 6 mills, 4 churches, 6 schoolhouses, out so as to improve the health of the workmen, with-… … These are three of six thousand three hundred pictures taken in the New York Subway at the rate of nine hundred per minute. The chronophotographic apparatus and the seventy-two Cooper Hewitt Lights by which the pictures were taken were mounted on a flat car which followed up the regular Subway…
Apparatus · Motor · Engine · Patents · American homes · Scientific American · Cooper hewitt · Boston water · Gold medal · Gasoline engine · York city · Gas engine · Smith premier · Real estate
Internet Archive · Public domain (published before 1931). Free to use for anything.
![An illustration from Toch's cement filler and cement floor paint : make Portland cement floors everlasting : manufactured by Toch Bros. ... [etc.]. (1914)](https://img.insideoutlibrary.com/img/200/ia-tochscementfille00toch-10-1.webp)
