230 



Popular Science Monthly 



MOVAbLt JAW 



Tails are more than mere 

 adornments. This one, for 

 instance, serves the pur- 

 pose of setting the trap 

 jaws of the imitation dog 



Dachshund CharHe. He Eats 

 'Em AHve 



A WESTERN inventor, Edwin S. Cun- 

 ningham, of Mansfield, 111., has 

 devised a trap which, for originality of 

 structure if nothing else, deserves mention. 

 He has constructed a wooden figure of a 

 dog (with the tail changed it would make 

 a realistic-looking alligator) and has placed 

 within the interior of the humble canine, 

 a strong rat-trap mechanism. 



Although the tail appears to serve only as 

 an adornment it is really the most impor- 

 tant part of the trap. By moving it down 

 the trap is set. When the mouse steps on 

 the bait-plate, which takes the place of the 

 dog's tongue, the upper part of the jaw 

 comes down with a thud and the tail goes 

 up. A strong spring operates it. 



Standardizing Our Automobile 

 Shop Language 



HEREAFTER people talking about 

 their automobiles 

 will be able to under- ^B^ 

 stand each other. A nut ^[^ 

 will be called a nut and 

 a bolt a bolt. When repairs 

 and replacements are or- 

 dered, manufacturers will 

 not need to spend the better 

 part of the day figuring out 

 just what part of the auto- 

 mobile's intricate anatomy 

 is wanted. In other words, 

 the present chaotic condi- 

 tion of automobile nomen- 

 clature is about to be 

 remedied. The Society of 



Automobile Engineers proposes that 

 there be a list of uniform names for 

 automobile parts and that these names be 

 standardized. To this end the society has 

 published a report on automobile termin- 

 ology. The automobile is dissected into 

 nineteen general divisions, and all the parts 

 in each division are given their standard 

 names — making a total of nearly seven 

 hundred names of separate parts. But the 

 work is not yet completed. There are 

 several groups still under consideration. 



The name "engine," notes the report, 

 should be used rather than "motor,*' to 

 avoid confusion with elec- 

 tric motors and to secure a 

 lower freight rate. Thus 

 it will be "engine-car" in- 

 stead of "motor-car." 



CLOSED POSmON 



Don't Throw a Horse. Make Him 

 Lie Down if it's Necessary 



VETERINARY surgeons frequently 

 have to throw a horse to perform 

 an operation. As there is danger of hurt- 

 ing the animal, specially devised shackles 

 are sometimes used, one form of which, 

 shown in the illustration, seems to be 

 especially humane and is very easy of 

 operation. 



The arrangement is such that a pull on 

 the forward ropes will draw together a 

 frQnt and rear foot and tend to raise both 

 rear feet from the ground, causing the horse 

 to lie down. The same thing can be 

 accomplished by hitching the front ropes 

 and making the horse step backward. One 

 leg is left free to aid the animal in assuming 

 a prostrate position without injury or 

 undue strain. 



With this device only three of the animal's legs are shackled, 

 one being left free to enable him to lie down rather than fall 



