Show — 'April Salt ffakc fdbunc Uh t (j Sunday Morning 30 1939 I 4 KGS y 'wi noiid raffi Apparatus for Molding and Measuring Volume Changes in Cement Mortar Bars Over Varying Lengths of Time The Invar Steel Bar Shown in the Centre Is the Standard VV ith hich the Mortar Bars Are Compared we dream today of "the glory that was Greece and the gran-A- deur that w'as Rome” so archeologists of perhaps 20000 years hence will marvel at the amazing egotism with which puny modern man challenges time and eternity They wnll gaze Jong upon rock-lik- e structures built in 1939 and perhaps meditate on ancient gnomes of the laboratory who evolved from chemistry fire and pressure better rock than AS LX A Nature produces except in her most efficient mood If you wish your name to endure through ages to come simply carve or a mold it in a block of the new cement recently evolved by the Engihigh-silic- neering Materials Laboratory of the and your University of California name will still be there thousands of years hence — though it may be shrouded in the earth strata of centuries to come Structures may now be built of the e rock which will outlast new the past and future existence of the pyramids by many nullcnia and which may bo subdued only by the geological and weather processes of the ages It is already a certainty that when every other remnant of our present civilization has been reduced to detritus structures made of the new cement formulae will still be available for study by scientists of the future unless of course they are willfully destroyed The new cements will last almost as long under the chemical attack of sea water as they will on land and in fact variations of them have been employed in the great piers' of the Golden Gate Bay Bridge and San Francisco-Oaklan- d Bridge Other variations of the formulae appear in Boulder Dam Grand Coulee Dam and Owhyee Dam yet another variation is to be used in the building of the Shasta Dam which will control the flow of the Sacramento River in California The permanent airport structures on Treasure Island site of the Golden Gate international Exposition incorporate Se'Jr ’E' f -- ” I - fc£r m'y: abr i i asS ha 3 nr: jrps£ Burning Experimental Cement fo Obtain a Spectrum And Thus Determine the Elements Contained in It dis rn t i Ki't 1 n t Min-neso- il Kt 4 ‘fovi ir ipY it V"'5 t Y-- r 4 V T Today’s Concrete Structures of the U S Bureau of Reclamation Are Said by Commissioner John C Page to Be Actually Permanent Due to Advanced Cement Formula Combined With Puzzolanas i S ytf jj better rock than I 1 The Turbidimeter With Which Experts Determine the Density of Vulverized Cements Its Principle Is Photo-Electr- t y I" I ic ii X s Canal Are Made of Advanced Formula Concrete Structures of the Concrete Which Is Expected to Outlast Many Human Generations Structures Above Are for a Siphon and Wasteway the new cements particularly where exposed to sea water With identically the same basic materials available to natural processes onr present generation may far outdo Nature in the creation of a durable rock for a number of laboratories led by University of California’s Engineering Materials Laboratory are now working on the same improvement program Their objective is the creation of a The Chair That Unfolds and Turns Into a Bed FPP Nature has ever achieved but they must juggle the same materials with which Nature works These are the 20 minerals which compose the earth's crust Of these 20 minerals the Engineering Materials Laboratory has found that a few possess properties which seriously affect the quality of any rock of which they are a e part whether natural or man-mad- Milestones of Science Dr J G Lyerly of ACCORDING to Fla insanity can be cured or at least alleviated by an’ operlobes of the ation on the brain which are the seat of intense emotional impulses and distinguish man from the lower animals pre-front- al The 1937 report of the Census Bureau listed heart disease with 346401 deaths first and cancer with 144744 deaths second in prevalence among the total of 1450427 Other ranking causes were pneumonia influenza nephritis cerebral hemorrhage and motor vehicle accidents V The obedience training of dogs has reached a npw height in Sydney Australia where the police dogs obey the commands issuing from a radio strapped to their backs Among the orders obeyed by one dog were: fire a revolver climb trestle and return backan eight-foo- t wards turn on a tap and remove and replace collar :p BY day a comfortable single-archair a recently developed piece of ont room furniture unfolds into a full- - FROM After four years of research Dr Arthur Cults Willard of Illinois University an authority of heating and ventilating declares that improves the chances of hospital patients for recovery length single bed Hinges which lock and metal legs make the bed rigid A mattress forming part of ss FANCY TO months It is “rained” upon for many days and high pressure pumps try to force water into it Another test involves placing the cement or concrete for several yeirs in bitter alkali water of a desert sink to determine what mixtures best resist destruction by alkali salts Tests of this nature made by the University of at Medicine Lake whose water Mfi rrK T vv 1tv r man-mad- A The Rock of Gibraltar a Natural Strong hold and One of the Mightiest Fortress on Earth Modern Experts Believe They Could Erect an Even Stronger "Rock” With Cement F the chair seat adds comfort to the device for sleeping Many people use them as "twins” separated by a reading table According to a recent report in the Canadian Medical Association Journal silicosis a lung disease resulting from the inhalation of silica or quartz dust may be both prevented and treated by the inhalation of aluminum powder STAINLESS A CT STEEL Golf Gets a J ' 5 h $ Aiff cfetfe t I'ftf WfI fifr Va tMm- ‘i ' ' I1 ’ T i Concrete Block Collapsing Under Immense Pressure at the Engineering Materials Laboratory University of CalA ifornia possess a salt content four times that of sea water reveal that various portland cements vary as much as 1000 per cent in their ability to withstand alkali action This chain of scientific research of which only salient features may here be mentioned is perhaps the oldest and longest continuous job humankind haa ever undertaken It began almost 6000 years ago in Egypt and Asia and achieved extraordinary development during the ancient Greek and Roman civilizations J v Magnet X ft r new perfect THE retriever is a small magnet made of alnico which is the most powerful magnet material ever devised Attached to f the magnet with YxYiill i n - durable line is the ordinary wooden tee The magnet acts as anchor After driv- ing simply place club near magnet and it jumps to steel shaft on bottom of driver No more hunting for tees ' BELIEFS t v "? i 4 - ' ' frMZt'cc V-- t ri xw SAYINGS AND GENERAL A WONDER ALLOY THREE TIMES THE STRENGTH OF ORDINARY STEEL STAINLESS STEEL ISNOT LIGHT Of some 1700 known varieties of minerals but very few constitute the bulk of all rocks One authority'states that 999 per cent of the earth’s crust is composed of only 20 minerals These Nature pulverizes burns or otherwise subjects to heat brings into admixtures of various proportions and subjects to prodigious pressures in order to create rock The laboratories are now treacling Nature’s geologically old path checking each step with scientific instruments especially invented and developed for unique purposes When they have created rock they then synthetically “throw a few thousand years at it” to see how it will weather Mighty steel pressure apparatus places it under pressures equivalent to many thousands of earth-strat- a Sudden impact machines drive at it to determine its resistance Tensile testing equipment attempts to draw it apart Then it goes to a “weather factory” which alternately freezing and heating the cement or concrete block runs it through a series of weather cycles which may amount to several thousand years actual weather experience in a few by Stuart EXPLODED A GREAT BOON TO AVIATION V ' o rr V D Foull A f' '"rW DIESEL-ELECTRI- C L TRAIN STEEL STREAMLINED”: STAINLESS - T- - - r tuoYI INLESS steel weighs as much as any other steel In fact it is slightly heavier is the result of reading about ie common impression that it is light no doubt ss steel streamlined trains busses etc being "Light Fast and Luxurious be made with are much lighter but this is due to the fact that this alloy can and less of steel tensile other than alloys more high times four or ngth three results same the to achieve structure be used in a This steel alloy is comparatively new and its name is very misguiding as it does not indicate its most important qualities— namely great strength and propeties It was patented 1916 and contained 030 per cent carbon 030 per cent manganese and 13 per cent chromium This composition has not been changed materially in the present day manufacture of stainless steel for general purposes It was first made in Sheffield England g Coprrlthl wmmmim ini St Klnt rtiir SjndluH Inc Stainless steel is probably the future aircraft material Extremely thin tubes sheets and webs can be used which would not be structurally possible with ordinary re vs steel or alloys and which engineers would not dare to use in stainless steel corrosion it not for its of qualities as they could not run the risk eating into a structure so light and thin The world is producing chromite at tM rale of two tons per minute day and night g ss 'W'VJ p - 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