Page:Popular Science Monthly Volume 92.djvu/93

 Popular Science Monihly

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��A Portable Dental Ambulance for Treating the Fighter's Teeth

.T the beginning of the war, the dental surgeon, so far as the Allies were concerned, was not officially recognized in army circles. Indeed, it was not until the Germans marched into Brussels, with a dental post every ten kilometers, that the Allies appreciated the importance pf oral hygiene.

To-day there are eleven American dental field ambulances in France alone. Men, who were formerly sent home on sick leave, whose only trouble was their molars, are now kept at the front. Soldiers, to the number of a division and a half have thus been spared to the army. Fur- thermore, the surgeons insist that a wounded man with bad teeth makes a slow recovery. And then, too, army rations are hard to masticate, so that the man with poor teeth "bolts" his food and loses strength and endurance. In our new National Army there will be a dentist for every five hun- dred men.

The accompanying illustration shows a portable dental ambulance used in several National Guard camps.

���Screen in raised position

��Hinge

����© Int. Film S rv.

Twenty per cent of the injuries the soldiers re- ceive are face and head wounds, which require dental treatment as well as surgical attention

��The protective metal screen permits the typist and no one else to see what she is writing

At the left the screen is shown raised. It can be adjusted to any make of typewriter

��Foiling the Busy-Body with a Letter Screen

CURIOSITY often impels persons to read letters which have been left in the typewriter in a partly finished condition. Business secrets and informa- tion of a confidential nature are thus very often divulged. A simple and effective rem- edy is offered in a de\'ice patented by Henry R. Knowles, of Rudley Park, Pennsylvania. It consists of a metal screen, hinged through its center and fastened to the carriage of the machine. It is adjustable to any make of typewriter. By raising the forward part of the screen, the typist may read the letter or make corrections when neces- sary. When released, the screen will drop of its own weight and completely cover the letter in the machine, with the exception of the last two lines, which the typist can see from a sitting position. These lines can not be read by any- one standing behind or in front of the machine.

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