Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 303
lative positions are in constant proportion. The bestcontrivance for measuring the spectra of absorption bands isBrownings bright-line micrometer, shown in fig. 227. At B is asmall mirror by which light from the lamp employed can be re-flected through E D to the lens C, which, by means of a… … THE USE OF THE MJCRO-SI,ECTROS(:<)I>E ^75 over the spectrum, and the exact amount of motion may be read offto ToJuoth incn 011 tne graduated circle of the wheel. To use thisapparatus, the Fraunhofer lines must be viewed by sending brightdaylight through the spectroscope, and the positions of…
Microscopy
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