Page:Popular Science Monthly Volume 90.djvu/868

 Do It with Tools and Machines

����Finding the in- clination of a plane with a simple compu- t i n g square

��Peepholes are attached to the arms to measure the exact heights of trees, poles, buildings, hills, mountains and landmarks

���A handful of sparkling diamonds used by an automobile manufac- turer in truing grinder wheels

��An apparatus for electro-me- chanical mas- sage. It is used to relieve neur- asthenia and constipation

���Manufactured screws are thrown in the hopper and the machine counts and delivers them to the packer

��Jar for holding water to supply moisture at all times to the intake manifold of the automo- bi 1 e engine

���A trestle with toggle levers to hold a board during the planing process

��A quick-return screwdriver is a valu- able addition to the automobile tools

�� �