objects immedi- is nothing in the domain of physics capable of ately advanced. being better illustrated by apparatus of the Seeing their own wares by polarized light, most simple and inexpensive character. The for some of the dealers, at least, was a new ex- subject of polarized light, as intricate… … are easily secured objects. Brazilian pebble spectacle SIMPLE FORM OF NORREMBERG DOUBLER. lenses often show gorgeous colors when turned at dif- GLASS STRAINED BY HEAT. ferent angles in the beam of polarized light. A small piece of window glass and a black covered The writer wellremembersthesmiles…
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