Page:Popular Science Monthly Volume 89.djvu/189
Popular Srjrncr MoniJih/
��A Perfect Megaphone Shaped Like a Ram's Horn
A BOSTON physician, Dr. Edmun.l D. Spear, has invented a megaphone which is constructed on tlie theory that the original liorn — the ram's horn — was and still is technically correct for sound reproduction. His megaphone is curved insteatl of the straight funnel- like shape of most other instrumenis, and one of the most interesting and useful features about it is the ability to use it without having it interfere with one's vision. Owing to the technical construc- tion of the curved horn the volume of sound obtained is also much more satis- factory. In adilition to this the tone is clearer and the enunciation more tlis- tinguishable. The best musical horns have the shape of a ram's horn.
����The ingenious water cooling and fuming attachment for the electric
��Perfuming and Cooling the Air with an Electric Fan
A CLEVER and useful attachment for the electric fan, designed Ijy a Los Angeles inventor, consists of a tin wheel which can be hooked on any electric fan, and which will increase its cooling capacity many fold.
The spokes or propellers of this wheel are made of fine mesh screen. The lower part of the wheel whirls in a tank which is filled with cold water. The electric fan causes the screen propellers to revoh-e, and they dip into the little tank, throwing up a small amount of water on the upward turn.
The air is sent through the water and is cooled, purified and cleaned. Perfume, a disinfectant, or a medicated li(]uid may be used instead of water.
��The simple ram's horn is the original Adam of all our present-day megaphones
��Why the Gasoline Engine Keeps the Farmer Boy at Home
ONE of the jobs on the farm, which has had as much to do in creating tile ilesirc of the farmer boy to leave and go to the city, has been the chore of sawing wood. It is one job that seemed never to be ended. With the advent of the gasoline engine, the work of sawing the wood, not only for farm consumjition but for commercial pur- poses, has been changed to one of great fascination, if not pleasure, in compari- son with its former drudgery.