Canadian foundryman (1917) . e has told you to go ahead;the bell may be forced open by a slip orby beine1 overweighted and the dust may burn you. For the same reason never gointo a dust car after it is spotted underthe dust catcher; pack the doors beforethe car is placed. Turn the water onfull before you open the bell, and waterthe dust thoroughly when dumping thedust catcher. Dont fill the car with hotdry dust and then turn the water on; itwill soak down slowly, and the contentsmay explode. Always place a card onthe car so that the unloaders will knowthey are handling flue dust. In a recent i
Canadian foundryman (1917) . e has told you to go ahead;the bell may be forced open by a slip orby beine1 overweighted and the dust may burn you. For the same reason never gointo a dust car after it is spotted underthe dust catcher; pack the doors beforethe car is placed. Turn the water onfull before you open the bell, and waterthe dust thoroughly when dumping thedust catcher. Dont fill the car with hotdry dust and then turn the water on; itwill soak down slowly, and the contentsmay explode. Always place a card onthe car so that the unloaders will knowthey are handling flue dust. In a recent issue of The Electriciansome new facts which illustrate thegreat impetus given to the constructionof electric steel furnaces are the outbreak of war over 100 in-stallations are known to have been putin, and the total number in the worldnow approaches .100, which is abouttwice the number existing in 1913. TheUnited States is credited with construct-ing 50 last year and Great Britain since I he war be^ FIG. JO. SAFE WAV WETTING DOWN HOT THOUGH. EXTENSION NOZZLE ONHOSE, MAN STANDING AWAY FROM TROUGH. 34 CANADIAN F O U N D R Y M A N A BELGIAN BALL-TEST MACHINE By J. W. G. THAT increasing recognition is beinggiven to that quality in metals generallytermed hardness is evidenced by thenumber of machines which are nowavailable for testing purposes. Amongthe different methods in use, the ball always occupied a prominent place,the Brinnell systembeing a standardtor certain classesof work. This with thepresent terribletragedy in a peculiar,almost a morbid in-terest to the deviceillustrated pre-war daysan international re-putation as a pro-ducer of the highestgrade of forgingswas enjoyed by theI sines G. DerihorSociete Anonynit,Loncin (Lez-Liege), and the balltesting machineillustrated herewithwas developed inthe Derihon shopsand used in theirwork regularly. Thewriter first saw thismachine aboutseven years ago
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