. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . fact, though apparentlytrivial in itself, is a contribution to anhypothesis which bids fair to revolution-ize the accepted theory of matter. substances of which radiumis the type, have the power of spontan-eously emitting radiations similar to thenow well-known Rontgen Rays—rayswhich have the power of acting on aphotographic plate, of passing throughso-called opaque substances, and ofionising, that is, electrically chargingthe air through^which they pass. In thecase of radium,
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . fact, though apparentlytrivial in itself, is a contribution to anhypothesis which bids fair to revolution-ize the accepted theory of matter. substances of which radiumis the type, have the power of spontan-eously emitting radiations similar to thenow well-known Rontgen Rays—rayswhich have the power of acting on aphotographic plate, of passing throughso-called opaque substances, and ofionising, that is, electrically chargingthe air through^which they pass. In thecase of radium, these rays are so pow-erful as to cause a distinct display ofenergy in the form of light and heat,and the amount of energy thus obtainedhas been found to be so great in pro- Defective Bending regard to tests of boilerplates, ship plates, etc., made of mildsteel, no doubt the cold bend test isabout the most important, but it shouldbe borne in mind by inspectors of suchmaterial that it is also a very unfairtest if the edges of such test pieces aresimply left as cut by the shears, owing. OUR MOST NORTH AND WESTERLY CLVll RAISER IN CANADA. ON THE EQUI- MALT & NANIMO RAILWAY. to the crystallization or hardening ofthe material all along the sheared edgeof the piece, caused by the pressure ofthe shear blades, which hardening effectcauses the piece to break short duringthe bending test. This more especiallyapplies to the thicker plates from ^ , and all test pieces selected forbending should be planed on the edgesin order to obtain a satisfactory and fairresult, and the pieces bent with a goodradius at the commencement, and after-wards flattened down by pressure untilthe required angle is attained; for bybending it round with a small radius atfirst, there is not enough space for thecompressed metal to occupy on the in-ner side of the test piece, and the localextension or flow of the metal on theoutside is distributed over too short adistance, causing fracture befo
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
