Page:Popular Science Monthly Volume 89.djvu/548

 534

��Popular SciciKT Moiitlilj/

��Eliminating One of the Tortures of the Dentist's Chair

���An impro\-ised enables him to

��By pressing three buttons located at the back of the chair, water of three given temperatures may be immediately obtained

COLD water on sensitive teeth as you sit writhing in the dentist's chair is the height of discomfort. No longer need the dentist submit you to this inhumane treatment if he uses the apparatus illustrated, form of Mater-heater have at his side at all times water of three fixed heats. All he has to do is to press two buttons to obtain water at the desired temperature.

The apjiaratus is fitted to the water fountain and three separate electric coils do the heating. The switch-control hangs on the liack of the chair. By pressing OIK- button the corres- ])(iiKling coil is thrown into the circuit to heat the flowing water to the steady tempera- ture of one hundred degrees. The upper button connects two coils anfl raises the ti'uipcrature of the flowing water to one hinidred and fifl\' degrees. By pressing both buttons all tiiree coils are utilised and the walcr is lu'ated almost to the boiling pwiiii. When the switch is off the water is of the usual flowing temperature well known to the patients.

��It Was a Man Dressmaker Who Invented This

AN ingenious German has in\ented a L (le\ice for accurateU^ chalking off^ tile length that a fashionable skirt sliould have. He has built a triangular frame on rollers. Attached to the frame in front is a wire-support. A piece of chalk can be fixed in the support at the right height by means of a thumb-screw, the height being accurately gaged by means of a vertical ruler attached to one of the legs of the roller-frame.

The skirt to be measured is hung on a dressmaker's lay figure, and the appara- tus is so placed in front of it that the lower part of the skirt comc-s into direct con- tact with the chalk while hanging be- tween the scale-rod and the wire frame. The frame and rod support the skirt and prevent it from slipping away under the pressure of the chalk. This makes it possible to get a clear chalk mark all the way around. Since the apparatus runs on rollers it is easily moved around the skirt, which is a decided ad\antage over the old waj- of re\-oKing the ku'- figure instead of the finger of chalk. The liolder for the chalk is arranged to slide easily over the supporting rod.

���The marker grasps the skirt and secures a firm surface upon which to make its line

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