IN a .-pacious ami busy niaehim -nop a. group, of aa was holding a d ilia o ci a large *tfteJ casting 'Miit-.Lad ..a , a yui; r hollow .-pot upon n.s su.rlai.e. r;v- hoi lav.- .place -was the “symptom” which they were alien lively observing. Was the casting -ouiui ne/pu. tout ominous Cavity .’ Were there unknown weak places inside the lasting where they couldn’t be seen?. .The little knot of men drew closer a.- they di.cu.,.-ed the problem. “There’s only one way to dml out,” finally decided the metallurgical tech nician. “Take-the casting over to the X-ray laboratory and have then X-rav it.” So the metal “patient" was loaded •>n a truck and trundled away to the X-ray laboratory. r- . A long glass tube with a round. ...wlM Vbove: \ll l!r«(lr lu \ Ray a Machine Part in an Industrial \45ay 1 .abor.ilory, fiiglrt: Hi is Strange Design Is an X-Ray licUirr of the Interior of a Bale of l.xcoUior lies eating the Presence of ! nreigii \rliclett Perilous to Workmen " ho l ^e tlie Picking. The Long Blm k l ines \re a Tangle of Vi ire ami the Irregular -Small Dark Objects Vre Bits of (»la«s. bulging center, w &s fitted in place directly over the cavity in the easting;.' Then everybody went out of the room, the wall? and door of which were lined with plates of lead. The operator went to hid control desk, moved a few handles and looked at a couple of in dicators. Then he stepped over to a lead-glass window tlirough which he could see the tube inside the lead-lined robin. The cathode, or strip of conducting How Will Power Is Tested WHEN the tensi!.- .>tmig£h'..of'« steel wire is , to be tested, it is placed in a machine,.that pulls it with constantly increasing force until it gives way. The force employed just S' the wire breaks i. a measure of its strength. Somewhat the same method of testing human v.ifl pod. i was actually employed, according to Julius Gallhuber, writing in.the Leipzig Hlustrierte Zeitung. in the -electing of men to take part in the British Mount Everest expedition. ' The procedure wa as follow Tn candidate was seated in a comfortable armchair with lus clothes loosened. Then he drew a deep breath and was told to refrain absolutely from furthei breathing as long as Ire possibly could. However, he was permitted to exhale. The follow ing phenomena Hoc ante apparent: After .‘10 to 55 seconds a slight discomfort and the desire to breathe were appai i:t This was fol lowed by a period of more or less acute pain which increased in an extraordi : ariiy quick manner unci lasted about 10 to 80 seconds. Now an unusual exertion anil self-control were neces sary to suppress the breathing. Then the pain gradually subsided, grew duller, and was easier to bear. At the same time the strain required to refrain from inhaling increased to an enormous degree, and after 3 to j'a minutes the person experimented upon fainted, if he had not thready col lapsed. The length of time that man may hold out without inhaling furnishes a will-power scale that is well qualified for the purpose of comparison. There fore, if he is capable of eliminating in halation until he faints, he possesses the greatest possible will-power, and seems eminently qualified for record performances. Although this experiment made it possible to measure will-power with some accuracy, it is, however, a very serious matter and should be under taken only after consultation with an expert physician and upon his advice I How the Industrial Doctor 1 X-Rays His Metal Patients A Powerful Light That Penetrates Giant Steel Castings and Gives Them I the Trartslucency of f Ice to Reveal All Concealed Flaws and ♦ .' Thus Prevent Any Serious “Ailments. ” metal acting as one terminal of the electrical circuit, was glowing brightly within the bulge of the tube. Two hundred thousand volts were galvan izing the stream of electrons shooting from the cathode and hurling them selves at the tungsten target directly in their path. Their impact upon that little surface produced the powerful X-rays which poured through the glass of the tube and penetrated the steel casting to a depth of more than three inches after an exposure of half an hour. A picture of what the rays revealed lnside the existing was. caught upon a photographic film, developed in an adjoining dark room, placed in front of an illuminated transparency, and carefully studied by the (““industrial' doctors,” the engineer and the metal lurgical man. After a long consulta tion they emerged, smiling. The cast ing was sound and the cavity could be filled by welding with perfect confidence. The X-ray “diagnosis" had saved the “patient.” Inspection by X-rays is not applied indiscriminately to test materials any more than human beings are pu> under X-rays merely on general principles It is used just as medical men use t —when obscure symptoms imply inter nal flaws in the inanimate patient Solving the Problem of Milk-Fed Pigs HOW to keep :a. constant supply of milk on tap for a litter . of motherless pigs i- a problem that was ingeniously solved by a farmer of Glen Kalb. New York. A glance at the accompanying ilius tration show's in detail the simple de vice by means of which each little porker can feed itself. A siphon u fixed into an end of a large keg which is filled* with milk A nipple i> in serted in one end of a rubber tube of convenient length which is attached to the siphon. AU each pig has to do » to take the nipple in its mouth and drink its fill. While the inventor of this novel de vice point- out that his pigs are fed without spilling one drop of milk, lie does not explain what his procedure would be in cash one porker should try to “play pig’- and monopolize the source of the food supply t Motherless l*i» Feeding Itself With Milk from it Siphon Apparatus Which Is Always Heads When Needed. Or. William D. Coolidge, of the Gen eral Electric Company's research lab oratory, contributed the advanced types of X-ray tubes now in use. Now an X-ray picture with the standard Above: l ike • Hif[ Hound-llodird Insert llovering Umr to an l nguinly Giant, •be X-Hay Tube* Hang* Opposite (hr hare of a Huge Steel tasting at a Point here “Internal Trouble*’ h .Suspected in (lie Inanimate “Patient.” 2 50,000-volt tube can be obtained in lialf an hour. Smaller objects can be X-rayed in periods varying from five to fifteen minutes. A stereoscopic apparatus gives (tie effect of actually looking into thr insidc of a piece of steel or iron. To the unaided eye this chunk of steel is densely opaque; the observer can look only at its surface. Even after the customary .X-ray film is handed to him he sees merely a flat area of a grayish tint with certain black markings upon it. Everything is on the same flat plane. Another X-ray exposure is made from a slightly different position. The X-ray tube is placed at a point on the -teol adjuccnt to tl^e spot at which the first exposure was made. Conse quently the two films, taken together, show what tile two eyes of a man would sec. if he could look inside the metal. These two films are placed in front of two illuminated transparencies. Be tween them, mounted on • a movable carriage, are two lenses, one for each ' film, When the proper adjustment of the lenses has been made. then, indeed, does the observer find himself looking into the very interior of the steel, three olid inches below the surface. Spots at the bottom of the three-inch area actually appear to the eye to be upon the bottom. The depth of the metallic structure is plainly visible. It is as if the steel had been transformed into a cake of ice for three inches of its thick ness, but it is ven more translucent than the ice / ice That Is Nearly Two V Miles Thick * GO I'O Greenland when you \ursi. to indulge in the sport of ice skating with the assurance that there is absolutely no danger of the ice breaking through and giving you a chilling bath. A German expedition recently meas ured one of "Greenland's icy rnoun tains." which was found to be 8,Sf>0 foot thick! This great thickness of the ice is taken as confirmation of the theory advanced by the late Professor Alfred Wegener, ill-fated leader of the expedition who perished on the ice last Winter, that Greenland is a gigantic howl full of ice; that is, the island is rimmed by high mountains while the "bowl" interior is filled and piled high with ice. The great depth of the ice was as certained by measuring artificial earth quake waves produced in the ice by blasting with dynamite. This method was developed ut the Geophysical Insti tute at Gottingen, Germany. Scientists say that the only thing that can crack ice of the great thick ness of that discovered in Greenland are time, the sun (heat) and dynamite The COMING of the AMAZONS SO long ago did the Amazons, a race of giant Greek women war riors, rule men that for hundreds of centuries stories of the deeds have been legends. The Amazons, as known today, were a mythical race of female warriors who established an independ ent kingdom in Pontus, near the Euxine -Sea.. They allowed no man to live in their country, but each year they visited the Gargareans who dwelled nearby. These women warriors either put to death all their male children or re turned them to their fathers. The Amazons kept all their female babies and trained them in the arts of agricul ture, hunting and warfare. The Greek Amazons find a counter part in the history of the eighth cen tury when a band of women warriors who, under Vlasta, fought against the Duke of Bohemia, enslaved or killed all their male captives. Orellana, the Spanish explorer, re lated that he came into conflict with women warriors in South America on the river then known as the Maranon. As a result of this meeting the name of the river was changed to the Vmazon. onui is inn recoruea mstory of thf* Amazons. Will they again return and rule men? Present-day writers see evidence of -uch a happening. Sherwood Anderson, the novelist, for example, sees modern man, as a victim of industrialism, meek and subdued and subservient to the will of women. Owen Johnson in his novel. “The Coming of the Amazons,” recently pub lished by Longmans, Green and Com pany, peers 250 years into the future and in an amusing satire pictures a -ociety in which woman is the supreme ruler, having reduced man to a mere instrument for perpetuating the race. The central character of Mr. John son’s novel is John Bogardus, a New Yorker of the present year. During * discussion of the mystery of hibprna tiori with'his friend. Dr.. Sacha)off, a biologist, Bogardus learns that the scientist has perfected a refrigerating machine in which a living body can be preserved for centuries in a state of .suspended animation. intrigued by the fascinating thought of thus being enabled to sleep away the centuries and awaken in a new world, Bogardus suh mits himself to the experiment. Two hundred and fifty years later, in the year 2181, Bogardus, under a thawing-out process awakens to find himself .in an aerial hospital floating three miles above New York City. He is surrounded by a score of flat-chested women clad in flowing Grecian robes They are all of an uniform stature and are seven feet tall They have blue SEES AMERICAN MEN SUBDUED BYWOMEN] ^Sherwood Anderson Is Gloomy] Over Devitalizing Effect of Modem Industrialism. [OLD FIGHTING SPIRIT GONE eyes, are bald and appear to be from 25 to 30 years old One of the wo men, who, appar ently, is of supei rank, takes charge of Bogardus, in troducing hersell as Acquilla. She is a resplendent, ruthless and un moral Amazon She does not look older than 24 years, although shi unhesitatingly ad niits that she is all of 70. Sentiment play? no part in this wo men’s world. Thf men have been dis franchised; mar riage and the fan, ily have been abol ished. The secret of the determina tion of sen has b e e n discovered and birth control is obligatory to meet the challenge of machinery. All children are brought up in state nurseries. In fact, everything belong: to the state which fixes the income of Madame Marthr, u French l ion Tamer, Who Presents the® Vppearunce of u Perfect Type of Amazon. The insert ** a Reproduction of a Recent Newspaper Head of an Interview in VV Itirlt Mart I* DcMtibed as a Victim of In dustrialism and Has Become Subservient to the ^ ill of Woman encq muiviuum according u* mem. Being a man of the twentieth cen tury, however, Bogardus naturally rebls against the laws of this matri archal state, but he is quickly brought to the painful realization that ‘‘what ever woman