| Show t i r jJ r l t t SCIENCE AND INDUSTRY J The chalk plate process is being used with satisfaction in the various arious monthly month month- ly y reports of the Climate and Crop ice Married people outlive the unmarried 1 the temperate and industrious live longer than the gluttonous and idle and b. b the residents of civilized nations live livelo lo longer g r than those of uncivilized coun- coun tries Sir Robert Ball makes the statement that of suns the existence can be proved scientifically Around each sun its planets revolve The electric flash which girdles the earth seven times in in less than a second might travel rt straight ah ahead ad for 1800 1500 years reach the farthest of these known suns suns qs Ii Liquid air is so cold that cold that mercury immersed immersed immersed im- im mersed mersed in it turns solid and can be employ emi empl em- em i pl ploy J e ed t to hammer a nail Y Yet t when a tf glass tube containing liquid hydrogen it is immersed in liquid air ail the hydrogen en t gently boils and gr gradually dually turns into tt apor vapor like w water ater simmering o over er a slow r. r t- t fire The temperature of liquid air is degrees Fahrenheit below zero but W f that is hot compared with the tem tem- r of liquid liquid hydrogen hydrogen which is about about d degrees below zero The St St. Lawrence canals will attract attracta a great d deal of trade when they are com com- The fhe capacity of the canals canaIs now f. f nearing completion will at first be beabout beabout about tons a year rear in one direction dire tion lion but b by degrees as ships are built l' l more to the requirements of the t he trade the capacity may be doubled and when J the power of the falls for ligh lighting ting purposes purposes pur pur- purI I z poses is fully used and the canal system r 1 comes under the go governments government's control t tons rons each way may be be han han- dIed i eV A shaft which has just been completed completed completed com com- by the Bethlehem Steel company for lor the nos Boston ton Elevated railway is 27 7 f feet t 10 inches long and the diameter ameter f of the flywheel wheel fit is 37 inches the theL L i diameter of i turn s. s 34 inches the i 1 diameter of the crank dJs disK fit 32 inches t The sha shaft it is hollow i J it e to axis xi ho hole e bein being g a r 17 z inches fn diameter The weight ft is C pounds The shaft haft is ol of fluid fit compressed nickel steel hydraulically r. r forged on a mandrel oil tempered and annealed t. t |
