Document 93yY423B2RyV7dBqXz0xaye8D

FOR MAXIMUM LIGHT Engineer's Bookshelf! (Conrinaed from page 144) > AND VENTILATION tise Hendrick Open Steel Flooring Its 90% open area offers minimum ob struction to the passage of light from floor to floor--and assures ample ven tilation. Its Mitco pressure-formed construction provides rugged, integral panels that will support heavy loads without any lateral deflection. The rec tangular, square-edge bars give a . thoroughly safe, non-slipping, level' walking surface. There are no bolts, rivets or angte irons to loosen, or to collect dirt and refuse--no welds, liable to have resid ual stresses and lead to warping. Hendrick Sbur-Site Treads for stairs, ladders and Are escapes, have all Hendrick Mitco advantages. A heavy, flanged nosing-bar, that makes the edge of each tread conspicuous, is,an additional safety feature. For circular walkways Hendrick furnishes Mitco Radial Grating. Hendrick Driveway Grating' has extra heavy bars, capable of sustaining the heaviest loads. Where light weight, or corrosion resistance, is o? prime im- Ei1rtmanacdee, Hendrick Mitco of aluminum. grating can and maintenance.ol electronic tabes' apparatus. Many chapter* here -- reference list*. BATntraonrt or Ineuimv. By Dnij Woodbury. 3*3 pegs*. 6*9, i/itut, Hi John Wiley A Sow, Inc, 440 Fourth A New York Id, N. Y. ' Since he left the newt editorship Power in 1929 for a distinguished cam at a free-lance writer of adence bocks 4 science articles let the general ruder, 6* Woodbury hat contributed greatly to t general undemanding of what mikes wheels go round in the modern worii' tii previoot books are: Commuaicoiw TAs Clou Giant of Palomar, Tht Cetera Conquest, fPhat Yau Should Know Aba Submarine Warfare, Beloved Scientist,1 t Builders far BetiU. In every one of hit bocks Mr Woedbi hat revealed hit rare cemhinaiies ulenis--skill with word*, clearness, dn tie tense and s retl undemanding sf b*i science end engineering. This last refits hta two engineering degrees Iroa^tl Massachusetts Institute of Technology; In the 933 text pages of BottUftsnis. Industry, be sets down the history ol We Ingbouse'o contributions to victory la W ` Wav 11. It it a thorough and detailed ji tound, carefully checked and easily 1 The over-tU picture ol Wettlngbono ce, tribuilona la highly Impressive. ' Touching only the high tpott here tw lack ol space, theta Include highspeed mounts, naval guns, plane Usdlag 1 pults, turbines end guns for wanhipA ts guns, stabiliser*, radar equipment, flew* torpedoes, binocular*, wind-tunnel mststAi X-ray development, searchlights, onafam Hendrick Armorgrids withstand hoariest traffic Unequalled for floors, loading platforms, ramps and driveways that have to withstand grinding loads, heavy shocks and continuous wear, Hendrick Mitco Armorgrids never reauire replacement. They do not depend on the fill tor development of full strength for resisting shock loads. Write for o copy of Hem/ricfr Mitco Products Catalogue HENDRICK Forferatod Matoli Forfotolod Mala! Scrum fjiCaitujaclu/unff r<$om/ianif Architectural Orilltt Mix. o... SI..I Hoorf.o, 46 DUNDAFF STREET, CAR80NDALE, PENNA. "SherSi* Treads and ArmwflHds Soles Offices In Principal Cities 144 (6S6a) Technical Briefs (Continued from page 142) load conditions, to maintain reajcatbl*'^ fuel consumption and ovoid oveilosdwi the motor. Thia it most convealesW _y done by throttling with a butterfly w'*' ;f in either blower auction e ***"* r Adjustment Is mainly to comp*****1* atmospheric variations and a c**' f lently located ammeter to shen* current proves a rough but tf" guide to throttle setting, autonts** trol not being necessary. ^ The scheme ahown in the diagr* been devised to overcome problem* ^ molly associated with a It**!9 ^ motor connected to the plaot but- are: (1) inability to start wibot side power source In event ol * plant shutdown (2) aneapee1