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 54
the upright figures between the pieces of looking-glass should be slender, and not too numerous, else they will obstruct the reflected light. In a box with six, eight, or more sides, lined with looking-glass, as above, the different objects in it will be multiplied to an almost indefinite extent.… … other weight, suspended from the bottom of the paper, to keep it smooth : then, by resting the right hand on the edge of the board
Juvenile literature · Scientific recreations
Library of Congress, Rare Book and Special Collections Division · No known copyright restrictions. Free to use for anything.
