CHILDREN and grown-ups alike are intrigued by shadow pictures. Many house parties have been salvaged from the depths of boredom by the arrival of a guest who knew how to flick his fingers before a table lamp in such a manner as to cast mirth-provoking silhouettes upon the living room wall.
New 4-in-1 Watch Think of getting, for only $19.75â€”not only a more accurate time piece, but ALSO :- 1. A STOP WATCH that at the touch of a lever checks off the time in seconds and fifths of seconds! 2. A TACHOMETER that gives you at a glance the exact speed at which any moving […]
Electricity Frisks Mattress IF PRISONERS in the Joliet and Stateville, Ill., penitentiaries should hide pistols, knives or saws in their mattresses, this machine will detect them. It is wheeled around the prison, and every mattress is subjected to its scrutiny once a day.
Builds Giant Television Tube DESCRIBED as the “Big Bertha” of cathode ray tubes, a new television tube developed by Allen B. DuMont, of Montclair, N. J., has a diameter of 13-1/2 inches. The largest tubes heretofore available for oscillograph work have been of a 9-inch diameter. The new television tube is distinguished by its rounded […]
MANY novel effects can be obtained by means of a simple process of converting ordinary photographic prints into black-and-white or colored line drawings. For engineering and other technical purposes, unnecessary or unimportant parts of machinery can be eliminated from a picture and the main structure thus given increased emphasis. For purposes of general illustrationâ€”serious or humorousâ€”the faces or figures of people can be exaggerated or caricatured, double pictures built up, extra features inserted, etc. Comparatively little drawing ability is required, as the original print serves as a guide.