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 53
SIGHT AND SOUND. Sl SIMPLE AND CHEAP OPERA-GLASS. In this new instrument, no tubes are necessary, as in the ordinary opera-glass; their place being supplied by a slender … very minute distances. Thus, the ordinary sliding tubesare super- seded ; nor is any external covering necessary, asthe hand in grasp- ing the instrument serves the purpose. If, however, a covering be preferred, a piece of silk may be sewn to the spirals of the spring. This kind of opera-glass may…
Juvenile literature · Scientific recreations
Library of Congress, Rare Book and Special Collections Division · No known copyright restrictions. Free to use for anything.
