Popular Science Monthly 



recently invented "break-away" bottles. 

 For a long time artisans in the motion- 

 picture industry have tried to devise a 

 transparent "break-away" bottle, that is, 

 a bottle which would have all the prop- 

 erties of glass except that it would not 

 cut or scratch. Until recently the bottles 

 used were made of an opaque substance 

 which would shatter readily, but which 

 was not transparent. The problem has 

 at last been solved in the modeling de- 

 partment of the Balboa studio in Cali- 

 fornia. William Dummer, chief of that 

 department, has invented such a bottle. 

 The material from which it is made, a 

 combination of ether, gelatine, resin and 

 oil, will crack and break like glass, but 

 it will not cut and may be shattered over 

 the head of the hero without in the least 

 marring his manly beauty. And, what is 

 equally important, it is transparent. 



This trick bottle is made especially to 

 "soak" movie actors over the head 



The Bottle Breaks, But Not the 

 Head of the Villain 



BREATHLESSLY the spectators are 

 watching the be- 

 wilderingly rapid de- 

 velopment of the dra- 

 ma on the screen. The 

 hero, singlehanded, de- 

 fies the villain and his 

 henchmen, while the 

 heroine, whom he pro- 

 tects, is hiding her 

 face. Neither she nor 

 the hero notices the 

 sneaky "Greaser," 

 who, armed with a bij^ 

 whisky bottle stealthil;\' 

 approaches the hero 

 from behind. 



The descending 

 bottle breaks into bits 

 over the head of the 

 hero, who drops in his 

 tracks. 



But, do not fear; the 

 bottle was actually 

 broken, but the hero 

 remained unscathed. 

 The Mexican's deadly This cup is made 



weapon was one of the oiled silk and can 



This Pocket Drinking-Cup Folds 

 Up Like a Purse 



AS a matter of sanitary precaution 

 , every man, woman and child should 

 carry an individual drinking cup. The 

 health authorities have long recognized 

 the importance of permanently banishing 

 the unhygienic and 

 disgusting public 

 drinking cups and 

 have strongly urged 

 everyone to carry his 

 own cup. 



One of the difficul- 

 ties in the way of 

 carrying out this re- 

 form was the lack of 

 drinking cups that 

 would fill the require- 

 ments of hygiene and 

 be so fashioned that 

 they could easily be 

 carried in the pocket. 

 The cup shown in the 

 picture consists of two 

 aluminum plates, con- 

 nected by a strip of 

 oiled silk folded in 

 bellows fashion. 

 The edges of the 

 aluminum plates are 

 folded over the edge 

 of aluminum and ^f the silk and crimp- 



bc folded up flat ed tightly. 



