Evening Republican, Volume 21, Number 278, Rensselaer, Jasper County, 10 December 1917 — Popular Science [ARTICLE]

Popular Science

One and a quarter million women are stated to be engaged in meq’s places on the British railways. * India ink originally came from China, but now It is successfully made in this country of lamp black and glue. An Australian scientist has invented a fluorescent microscope to be used with ultra-violet rays, which enables differences In matter not perceptible by ordinary light to be recognized. A Harvard professor of chemistry is making experiment with lachrymogenlc gas for use in the trenches. It causes copious weeping that renders accurate marksmanship impossible on the part of the enemy.