"Trapezoidal" Quotes from Famous Books
 ... a plan and elevation of a bone-black room, containing light filters, A, arranged in a circle around wells, B. These latter have the form of a prism with trapezoidal base, whose small sides end at the same point, d, and the large ones at the filter. The funnel, E, of the washer, F, is placed in the space left by the small ends of the wells, so that the black may be taken from these latter ...
— Scientific American Supplement No. 360, November 25, 1882 • Various |
