Perkins, Henry, 1803-1889, publisher., Haswell, Barrington, and Haswell, printer., McManus-Young Collection (Library of Congress) · Philadelphia : H. Perkins, 134 Chestnut Street, MDCCCXXXVIII [1838] · leaf 23
gt FP Fn —< - S => At? ae 1 ig Pa ree oe PS — WRADM SMWwATTOMWS. THE SPECTRAL LAMP. … flame; if, however, it should not be perfectly yellow, throw more salt into the cup. The lamp being thus prepared, all other lights should be extinguished, and the yellow lamp in- troduced, when an appalling change will be exhibited; all the objects in the room will be but of one colour, and the…
Juvenile literature · Scientific recreations
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