Mechanic Arts High School - Artisan Yearbook (Boston, MA)

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28 THE ARTISAN A giant and a midget among electric lamps appeared to- gether recently in one of the laboratories of the General Electric Company. A tiny neon light, a quarter of an inch in diameter, claims the distinction of being the smallest lamp ever made to operate on the ordinary 110-volt household lighting system. Its big brother, one of the world's largest incandescent lamps, de- veloping approximately 100,000 candlepower, is used for motion picture studio lighting. SICAPLANE LIFTS FIFTY-FIVE TONS On its much-delayed way towards South America from Ger- many, the giant German seaplane, D0-X, recently set a new world's record for heavier-than-air machines. In a test flight it lifted a total load of 55 tons into the air. HEAT-RESISTING GLASS Glass designed to resist the extreme temperature oil a giant rotating aerial beacon has been perfected. The dome- haped cover of the light is so large that a person can stand head and shoulders inside of it. ln shape this cover resembles the old bell jars of the nineties. The moving parts of the air beacons will be kept clear from much dirt and grit by this glass dome- shaped cover. U i..i.... MOLTEN SPRAY KEEPS RAIL JOINTS TIGHT Faced with the heavy expense of tearing up pavements to tighten loose rail joints, electric railways are interested in a process which keeps the rail points tightened over an indefinite period. The theory that the rail joints were loosened by rust and mill scale at the rail ends and not by vibration, was responsible for the discovery of this process. This permanent tightening process involves the spraying of molten metal at the connections, compressed air being used to blow a fine mist of metal over the entire area to be assembled. Copper, brass, steel, chromium, nickel or any other metal may be used for the plating. SIGNx1'ROJl+1CTlCll ONTO BUILDING BY SEARCHLIGHT Transforniing the woi-ld's tallest skyscraper into an illumi- nated bill-board, a powerful S9ill't'llllgllt was employed recently to project words onto the side of the Empire State Building in New York. The light cast the words, The United States Army Builds Mend o11to the wall.

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THE ARTISAN 27 - X 111111, E A MWHE1 .1 z NEXV A111 11i1CA1,'11NS FAST TNVU IIEAMS AT ONCE For 111111111151 1111' 11111hs of 11112111-i'1j'1llQ pilots. p11we1'f111 new 11.x11111'i1111111t111 il11' 1111111-1111s 111111 1111i11g i11s111111111 ut vzlrious points i11 11111 1'11i11111 St11111s. '1'1111y 111'11 u11i111111 i11 that they 111111 throw 11 111111111 111' light 111-1-oss 11111 ski11s i11 two 11i1'1111ti1111s 11t the sumo 111110. S11111-i:11 11111s11.s w111'11 1111V11111111111 s11 11111t the 1111111-wfltt 11111111 with w11i1'11 11111'h 11111111111 is 11111111 will 1':1st 21 1,51111,11011-11111111111pow11I' 111111111 tw11 ways XV11110111 11x1111ssive use 11f 11111011110 current. On 1f111.111' nights' they 111111 1111 s111111 for fifty 111i111s. They make one 1'11t11tion six times il 1ll11l1lt0. NEW GVN IIVRLS SIIELL FIVE MILES STRAIGHT UI? A11 1111111111111-111111 gun that 111111111 111111 11v1111 Mt. Everest, the w111-111's 1111111081 111-1111, h11s 11111-1111115' 11111111 11ev11111p1111 i11 Englzlnd. The w111111o11's 11x11-11111'11i11111'y v111'ti1-1e 1'1111g111 11111111111s it to destroy 211'l'l111l1l1'S 11s high 11s 1iV11 111i111s 111111v11 the 1'21l't1l,S surface. D11- 1111111-011 11y 11111 V11-111111s 1i1'11111-111s 1111111-111-11, the 21111 is 1:ontro111111 hy il 11l?,V1l'0 111211 1111111s it 1111t1111111ti1'1111y 1111 t1111 target. It can 111111 its 15-1111111111 shells i11 any 11i11111-1i1111 w1111t11v111', and is 11 111111111y w1111p1111 11g11i11s1' 111111118 111111 111'111111'1111 1-111's HS Well as air- 111E1ll0S. 1's1111 :lt 10XVl'1' 1111g3,'111s it 1'u11 s111111 objects eight mi1e.s away 111i the 1-:1111 of 25 1'11111111s 111111 ll11ll11f1!. It is conteniplnted 1l1111111l1g guns 111' 11111 s1111111 design but with g1'11.11te1' Pilllge. NEON-1111111Tl'E11 XVEATIIER VANE A gig1111ti1-, 11111zi11g w1111t11111' v111111 t11 51111110 pilots by night 111 the 111111111111 1i11111, 2:11111 t11 i1111i1-ate the 1111-111-tio11 of the Win11 s11 that they will k1111w 11111111 w1111t 111115111 111 ilIDIJ1'0ilC1l the field, 1111s 11111111 s11t up 1-111-1111t1y 111 1'1111y111111, 1'11fgI12l1ll1. Tl1e unusual 1'1111t1'iv11111-11 is il 11111311 111111111 T 111211 swings with the wind on E1 111111111 fl'1Il1111 1111s11. 11' is 111111i11111111 wit11 1111w111-ful 1'1111 neon lights, xx hieh 11111 S21i11 t11 1111 1111111 to 1111111111 fog to il 1-1111si11111'11b1o distance.

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TH E ARTTSAN 29 STILL l'ICTl'llES OF HIGH-SI'l'IEIl ENGINES NOXV TAKEN To study the behavior of machines while they are running at high speed by Hstopping' or slowing down the rapid motion so the eye can perceive it. an improved type of instrument known as a stoboscope has recently been developed. VVith this type of apparatus it is possible to take still or moving pictures show- ing the speeding parts of machinery in clear detail. Such pic- tures are made possible by using a thyratron tube of the mercury- arc type, the intense actinic light of which allows making photo- graphs at exposures of ten-millionths of a seco11d. NINE-FOOT LIGHT TESTER One of the instruments used at the General Electric Com- llIlllj',S laboratories at Schenectady. N. Y.. to measure the output of various lights is a double-leaf diaphragm, similar to the one 011 an ordinary camera, the iris shutter. It is employed to cover a photometer which is said to be capable of gauging the intensity of almost any size of a lamp, from the tail-light of an automobile to a searchlight of o11e billion candlepower. THE AUTOMATIC CHEMIST Now comes the Wautomatic chemist, a device that relieves the chemist of one ot' the most tedious parts of making an analy- sis. As recently demonstrated in New York City, the automatom measures either the acidity or alkalinity of a solution or the amount of certain ingredients in it. When the measurement is completed a bell rings and lights a light. This fundamental operation known to chemists as Ntitrationv is important in every application of cl1e.mistry, from making shoe leather to the testing of a city's water supply. A careful titration may take half an hour of a cl1e1nist's time, but theauto- matic chemist requires no attention after the start. A beam of light from a lantern shines through the beaker containing the solution, falling upon a sensitive electric cell opposite. When the. solution turns white or neutral at the addition of one drop of the acid or alkali, the electric eye turns off the supply and rings the bell. The amount' of acid or alkali required to neutra- lize the solution can then be read from the graduated tube. The automatic cl1e111ist has bee11 found to be very accurate.