392 



Popular Science Monthly 



Testing the hearing of a soldier with the aid of a 

 machine which regulates the length of sound waves 



Buy Good Meat and 

 Chop It Yourself 



TWO series of investiga- 

 tions of ten samples 

 each of Hamburger steak, 

 made by the Department of 

 Agriculture, revealed the fact 

 that six samples of the first 

 and five of the second series 

 yielded counts of more than 

 ten million microbes per 

 gram. A great many differ- 

 ent kinds of bacteria were 

 found and the conclusion 

 was reached that a large 

 amount of Hamburger steak 

 sold in the market is unfit for 

 food. The Department ad- 

 vises that the housewife buy 

 good cuts and chop it herself. 



Deafened by Shell Fire, but Cured 

 by a New Sound Machine 



WHEN the big guns fire, not only are 

 men before it killed, but hundreds of 

 those behind it lose their hearing, due to the 

 terrific noise of the explosion. The roar of 

 a barrage fire is like a million boiler 

 factories plus a hundred thousand pneu- 

 matic riveters. Little 

 wonder is it that the 

 ears can not with- 

 stand the noise. 



In Europe are thou- 

 sands of shell-deafen- 

 ed soldiers. In the 

 accompanying photo- 

 graph a soldier is 

 shown facing an ap- 

 paratus for graduat- 

 ing and applying the 

 sound waves. With 

 the aid of this ma- 

 chine the nurse is able 

 to know just how deaf 

 her patient is and to 

 what sounds he re- 

 sponds most quickly. 

 It is a slow and pains- 

 taking method of 

 treatment, but it has 

 resulted in a number 

 of cured cases. 



In fact, the deaf- 

 ness resulting from 

 the battle noises is, in 

 the majority of cases, 

 only temporary. 



A fishing pier with a seat and 



a foot rest to prevent the men 



being pulled overboard 



from 



Anchoring the Fisherman to the 

 Fishing Pier 



AFTER several fishermen had been 

 . pulled off the Redondo Beach pier, 

 near Los Angeles, California, by large fish, 

 the city built a new pier with special pro- 

 visions for keeping fishermen anchored to it 

 so that "the biggest fish that ever was 

 caught" will no longer 

 be able to get away 

 with bait, hook and 

 line as has so often 

 happened in the past. 

 The pier is con- 

 structed of reinforced 

 concrete. Around its 

 outer edge is a seat 

 for the fishermen, and 

 a concrete rim on the 

 foot rest enables the 

 men to hook their 

 boot heels over it 

 while fishing. 



Fish weighing as 

 much as two hundred 

 and ninety pounds 

 have been caught 

 from this pier even 

 before it was made 

 safe for the fishermen. 

 The big fish haven't 

 called that way lately. 

 But when they do 

 they will find the 

 fishermen anchored to 

 their posts, ready to 

 pull them on land. 



