Page:Popular Science December 1931.djvu/130

►he's fighter mates ! biiil«l and sail this mighty all steel superdread naught Here's a flagship that will make your blood tingle. A roaring, racing bulldog of the Navy. All steel from stem to stern — built just like Unrle Sam's mighty nionarchs of the sea. You build this gigantic warship yourself. Lay the keel like they do in the big Navy Yards, fit on the hull and armor plate and mount the guns. But the big moment is when you launch her — when you see her awaken to a proud sea life and go forward under her own power. You can build all kinds of thrilling ships with this wonderful Meccano Shipbuild- ing Outfit. Gigantic ocean liners — dashing speed boats — adventurous pirate ships — and many others. In the sturdy, green Meccano Sea Chest you will find everything you need for building real ships — vessels that actually float and run. MECCANO "The Toy tfanl made Enfcineerinfc FamoUH'^ "Juttt Count the Holett*^ Meccano niran^ lirltrr and <'asicr model Iiiiildinii. Th^* fainutis Mcrrano flat beams and anple Itrams have rt|iiii !• ly spaced holes (1/2" a|iarO. Y»ii jiit^l rnnnt ihe holes. Also. Merrann pives a conneclion or hearing wherever it is needed. Interchanpieable v«ith other construction toys. 1 Solid Steel Ship Hull. 23" lonp. Built to float and run. Other exclusive ship fealiires — ship funnel, decks, keel, propeller, pilot house, and many others. (In No. 113 .Meccano Outfit and up.) 0 Meccano Patented Super-Power Unit (Couihinatiou " Electric Motor and Gear Box). Again — ju»t count Ihe holes. Aflapted for simple reversing connections. (No. S Meccano Outfit antl up.) Q Patented Meccano Two-Drum llO-volt Electric Hoi<itiiiff Eufciiie. Ei|uipped with famous IlO-volt Polar Cub Motor. Multiple disc clutch. .Miniature replica of a genuine huinling engine. A complete operating unit for liuilding hoisting machinery, der- ricks, cranes, elevators, etc, (In No. 12.> .Meccano Outlit and up.) ^ Patented Meccano Braced Girders, 12" long. 2" %»i«lp. 5 Solid Steel Disc ^'heeh with genuine Diinlop solid rubber tires. Fascinating fun. stupemlou'i surpri^^es, thrilling adven- tures in mechanical mysteries— they arc yours with Meccano. Meccano itt carried by all leading department stores. Co in and see the wonderful Shipbuilding Outfit un<l other Meccano Outfits— priced from 5 LOO anil up. Take your Dad along. He will be as eager as you to have a .Meccano Outfit. Join the Meccano Engineers The greatest boys* engineering club in the world. Be the first boy in your set to join. Handsome itieiii)ier<ihip badge sent free. Also illustrated book on Meccano. Clip coupon today. "the meccano engineers, 510 Mc»-eano Circle, Neve Haven, Conn. 1 want tojoin the MecraiioBoy Engineers. Please send /re*! iMemhersbip Badge and copy of free book on .Meccano. Name ' Street City Slate WHY GOOD LITTLE MEN BEAT GOOD BIG MEN (Continued jrom pane 22) The strcnKth of a man's arm and shoulder muscles, it was shown, determine his pulling power. This test was made with a new appa- ratus, called a hand dynamometer. . simple device, it is equipped with a spring and two handles. When a man pulls on the handles with all his might, the amount of power he exerts, in pounds, is registered on a dial. Pushing power is measured by pushing the handles toward one another. What do these tests mean to you and me ? Suppose you are five feet two inches tall and weigh about 100 pounds. What should your push and pull power be? About eighty pounds for push and sixty-five pounds for pull, says the Public Health Service. If you are a stocky person of the same height, weighing 160 pounds, you ought to push 110 pounds and pull eighty-five. In case you are about six feet tall, slender of build, and weigh only 140 pounds, both your push and pull should be lighter, ninety- five pounds and eighty pounds, respectively. But if you are a six-footer weighing in the neighborhood of 180, you should be able to push 115 pounds and pull ninety. A CURIOUS fact which the experts were at a loss to explain was that, gen- erally speaking, the tall, slender men had to bow to the short, stocky ones of similar weight in pulling, but defeated them in lift- ing, which is merely another form of pulling. To test their lifting power, the men were made to grasp, at the height of their knees, a small horizontal bar connected with a chain attached to the floor. Their Ufting power was registered on a dial. The heaviest men were found to have the most powerful grip and they could "shake hands" with you to the tune of 108.48 pounds, pretty close to the maximum recorded by the measuring device, a small pear-shaped affair containing a spring. It is worked by the pressure of one hand. The man of average height — five feet six inches — weighing about 140 pounds, ought to have an eighty-five-pound grip; if he is twenty pounds heavier, it should reach ninety. In the lung-power tests, the short, heavy- set lads again were the winners. Greatest lung-power was demonstrated by the shortest men in the 150-159 pound class. This was measured by a Baumanometer, in which a column of mercury is pushed upward by the force of a man's breath. The men with the strongest lungs blew the mercury up six and three-fifths inches. If you are five feet eight inches tall, but weigh only 120 pounds, you should be able to push the mercury up five and one-third inches. But if, with the same height, you weigh 170 pounds, you ought to drive it up five and three-fourths inches. LUN'G fatigue — that is, the length of time during which a man can hold his breath — also was tested with the Baumanometer. It was measured by liming in seconds, with a stop watch, the period for which a subject could support the mercury column at a height of one inch and a half. The final test was that of vital capacity. In this experiment, the amount of air a man can expel from his lungs after breathing as deeply as possible was measured with a spirometer. The measurement was made in liters, a liter being slightly more than one quart. This capacity, it was shown, is about equivalent to chest expansion, except that it is cxpres.sed in volume instead of inches. The experiments proved that the average man attains his maximum strength at the age of thirty, after which it declines grad- ually. Lung fatigue, however, varies only sligbtly with age. Here's ThaO Long-Hoped-for "HOME WORKSHOP MANUAL" at a new low price! Order NOW— send NO MONEY— and get this BIG WORKSHOP MANUAL for $1.05 less than the regular price. 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If I am tlU- ! salififled with the boolt I may return it and you will ' refund my money. (Please print your name below so that it will Ije properly spelled on your book). Name City Stale , 126 POPULAR SCIENCE MONTHLY