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 tlie 

 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 



