The Building Edition for October. lens upon the carbons of the light to be photographed, It is a rare treat to turn over the pages of the October issue of the building edition. This number and then giving either a preliminary or subsequent exposure of the carbons, when the arc was not in is filled… … the alternating arc to wander was tion by Prof. Arthur W. Riicker is much greater than that of the con- continued. “Pig-Iron Casting Ma- tinuous-current arc. The results thus shown in Figs. chines” describes a unique method of doing away land. Mr. Philip L. Slater, the well-known secretary 5 and 6…
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