198 



Popular Science Monthly 



A vessel carrying a new device for killing sharks by electricity. The detail of the device by 

 means of which the bait is charged is shown in the lower right-hand corner of the picture 



nected with the metallic hull of the vessel 

 and the water. 



When a shark seizes the bait, he pulls 

 on the cable, and the reel is rotated. 

 The electric current then shoots from the 

 dynamo through the cable, the hook, the 

 shark's body, the water, and the ship's 

 hull back to the dynamo. The electric 

 shock contracts the shark's jaws around 

 the hook like the jaws of a vise, so that 

 escape is impossible. He is electrocuted 

 almost instantly. 



Co-operative Kitchens to Solve the 

 "High Cost" Problems 



THAT the cost of the primary necessities 

 of life has increased to a point that 

 causes hardship, privation and under- 

 nutrition among the unemployed or in large 

 families striving to exist on a small income, 

 is no doubt pitifully true. In the majority 

 of cases, however, it is expensive tastes 

 and pampered appetites which suffer most. 



Ignorance of how to spend money in order 

 to get fullest food value and of how to pre- 

 pare the food to the best advantage is 

 also a contributory cause of hardship. 



The food actually required for the body's 

 needs costs very little. Enough pork and 

 beans, bread and butter, milk and coffee, 

 with the fuel to cook it, to amply nourish 

 an adult for an entire day would cost 

 only about twelve cents, according to 

 expert dietitians. Numerous other in- 

 expensive and healthful foods there are 

 to add variety; but the problem is to 

 govern the quantity and kinds of food 

 by the needs of the individuals to be 

 served and to prepare it appetizingly. 



The solution seems to lie in the co- 

 operative kitchen, in which Science writes 

 the menus, consulting not the personal 

 appetites of the patrons but their specific 

 needs. The highest cost of meals for an 

 entire day in such a kitchen should be 

 not more than thirty cents for each in- 

 dividual, including the diagnosis. 



