Popular Science MonMy 



Canned Ostrich Eggs May Find a 

 Market in London 



SIGNS reading "Newly canned ostrich 

 eggs for sale" may soon meet the 

 eyes of the housewife looking into the 

 windows of grocery stores in London. 

 This statement is based on the fact that 

 ostrich eggs are being packed experimen- 

 tally in South America for shipment to 

 England in liquid form. One 

 ostrich egg is equal to about 

 two dozen hen's eggs. If 

 the canning of these eggs 

 proves successful, it will 

 mean the salvation of 

 the ostrich growing in- 

 dustry which has suf- 

 fered considerably as a 

 result of the war. It will 

 take a large family to con- 

 sume one breakfast egg. 



Kneeling in Cotton Fields Made 

 Comfortable by This Pad 



COTTON pickers have to work for 

 hours at a time kneeling upon the 

 damp ground. They suffer tortures. 

 To relieve them, Robert T. Jenney and 

 Rudolph J. Langer of Monticello, la., 

 invented a knee-protector. After the 

 invention was perfected, it became ap- 

 parent that it would be equally beneficial 

 to miners, cement workers, carpenters 

 and gardeners. 



The knee-protector is made of strong 

 spring steel. It is just of the right height 

 to place the foot in a restful position. The 

 knee rests in a felt-padded hammock of 

 leather or canvas be- 

 tween the upper arms 

 of the coiled spring 

 while to the lower arms 

 a metal shoe is fastened 

 which is slightly curved 

 upwards in front. The 

 device is fastened to 

 the leg by two straps, 

 one above and the 

 other below the knee. 

 The construction of this 

 humanitarian de\ice is 

 shown in the accom- 

 panying illustration. It 

 should prove beneficial 

 to many workers. 



The knee rests in a padded 

 hammock of leather or canvas 

 supported by coiled springs 



Delightfully re- 

 freshing is a swim 

 taken on this aquat- 

 ic bicycle which has 

 air chambers for 

 buoying you up, a 

 propeller for for- 

 ward progress, and 

 a rudder for turning 



Ride This New Underwater Bicycle 

 —It's Great Sport at the Beach 



AT the average bathing Coach about 

 . all you can do is swim, or paddle 

 around in an old canoe. 



And so P. Kraemer of Jersey City, N. 

 J., devised the underwater bicycle here 

 illustrated. With this bicycle you can 

 make as much as six or eight miles per 

 hour, which is fast for swimming. 



But do you swim on a bicycle? You do 

 on Kraemer's, in a sense, for most of your 

 body is submerged. The submerged fea- 

 ture was especially desired by the in- 

 ventor. He wants you to get the full 

 effect of the water's coolness on a hot day. 

 The two tanks shown 

 are of course filled with 

 air, so as to support 

 a rider of almost any 

 weight. The handle- 

 bars control the rudder. 

 This contrivance 

 should appeal to those 

 for whom ordinary 

 swimming methods 

 are too slow. This 

 aquatic bicycle may 

 make the fish join the 

 birds in wondering 

 where man's encroach- 

 ments on other domains 

 are to end. 



