Minutes of proceedings of the Royal Artillery Institution (1858)
Great Britain. Army. Royal Artillery Institution · Woolwich, Eng., : The Institution · leaf 323
ordinary scale, estimating to tenths of the smallest divisions marked on the scale, how to use beam compasses and calipers, screw microm¬ eters working by touch, micrometer microscopes, the spherometer, the cathemometer and so forth. He learns to use and test the plani- meter as well as to measure… … Fig. 1. Optical Fever. This is the same in principle as the optical lever described in various text-books on practical physics. A small three-legged stool carries a mirror ; its two front legs rest respectively in a hole and in a slot, while the third leg rests on a plane surface at the back. The…
Artillery -- Periodicals · Artillery -- Great Britain -- Periodicals
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
![An illustration from Original microscopic drawings made between the years 1824 and 1840 mostly published in works by Dr. Goring & A. Pritchard [graphic]. (1824)](https://img.insideoutlibrary.com/img/200/wellcome-wellcome_b21301177-83-1.webp)
