I opular r>cience Monf/ili/
He Outswims the Ducks in ^
His New Diving Dress
ON a recent gray Saturday afternoon, in London, the fussy little tugs and launches were puffing about their business on the Thames, and every now and then a lumbering Thames barge would pursue its un- beautiful bullying way down the river. The whistles were hooting, and a few gulls wheeled about, picking up scraps from the oily water — in short, it was just a regular, misty, gray London after- noon. Suddenly, though, there was a shouting and a cran- ing of necks, and the sleepy river life be- became immediately vAde awake. A man had jumped into the river from one of the boats. Was it an at- tempted suicide? Had he gone over to rescue some one? The black, murky waters swallowed him up. He bobs up. The river men could hardly believe their eyes. He had reappeared with a two-bladed paddle, and was propelling himself along! It all proved to be a demonstration of the new David- son life-sa\'ing suit.
This costume is made on the same principle as a di\dng-suit. It is both air- inflated and waterproof. Air-chambers are pro\ided in the body portion and in the leg portions, and these may be blown up by the mouth, through suitable tubes. The dress can be inflated in forty seconds. A belt around the middle, together with ad- justing the amount of air in the various chambers, serves to regulate the equilibrium.
����The service stamp to be affixed to your letter to inspire your friends with your own sense of duty to flag and country
��Properly inflated — but not with self-conceit — you can paddle yourself along com- fortably in this union suit. All you have to do is to in- hale as much air as possible, then exhale it through the tube into the costume. In other words buoy yourself up with your own hot air
This shows a man properly equipped for a trip that is apt to lead him into a tem- porary sojourn in the water. The suit is air-tight, and if he has enough breath left to inflate himself he can -^ keep afloat for a long while
The Service Stamp is the Latest Patriotic Device
IN these days of rapid introduction of various kinds of new stamps it is not surprising to hear of the service stamp. These stamps are made in sheets of one hundred \^dth one, two or three stars, as circumstances require, and are de- signed for use in the same way as the Red Cross seals. The cost of a sheet of one hundred stamps is negligible.
' Affix one of these
stamps to your let- ter, and thereby give your friend a hint that you have endeavored to ful- fil your duty to your country; it is bound to be a re- minder to him if in any small partic- ular he has been remiss in that meas- ure of duty which we owe our country.