Six lectures on light : delivered in America in 1872-1878 (1886)
Tyndall, John, 1820-1893 · New York : D. Appleton · leaf 130
iron filings, for example—we findthat they act substantially as the needles, arrangingthemselves in definite forms, in obedience to the mag-netic action. Placing a sheet of paper or glass over a barmagnet and showering iron filings upon the paper, I ill. POLARITY AND STRUCTURE. 99 notice a tendency… … N is the nozzle of >ho lamp ; 51 a plane mirror, reflecting the Deam upwards. AtP the magnets ■Mid iron filings are placed; L is a lens wliieh f.)rms an image ofthe magnets and lilings ; and R is a totally-reflecting prism, which casta the imageG upon the screen. each tap releasing them for a…
Light
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
