Metallurgy; an introduction to the study of physical metallurgy . actly parallel to oneanother in a siagle continuous pattern all over the surface tobe covered. But for this purpose it would be necessary tobegin the process at a single point and to work outward fromthat alone. If the work were begun by several operators atthe same time, each starting from their own chosen centres andworking each to his own scheme, without reference to thatadopted by any of the others, a very different result wouldfollow: each man would build up a regular pattern, and allthe patterns would be essentially ahke,
Metallurgy; an introduction to the study of physical metallurgy . actly parallel to oneanother in a siagle continuous pattern all over the surface tobe covered. But for this purpose it would be necessary tobegin the process at a single point and to work outward fromthat alone. If the work were begun by several operators atthe same time, each starting from their own chosen centres andworking each to his own scheme, without reference to thatadopted by any of the others, a very different result wouldfollow: each man would build up a regular pattern, and allthe patterns would be essentially ahke, but they would not beparallel or similarly oriented, so that where they met theywould form irregular joints. The dia|;ram of Fig. 14, Plate IV.,shows five stages of such a process, and the final result, withthe blocks themselves left out and only the outlines of the jointstraced where the various differently-oriented areas have outline is exactly like the boundary between adjacentcrystals in the micro-section of a pure metal—it is the acoi* PLATE (a) m
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmetals, bookyear1922
