. Spons' dictionary of engineering, civil, mechanical, military, and naval; with technical terms in French, German, Italian, and Spanish . n placed upona wooden trestle, and by touching with a piece of cold iron the pear-shaped neck near the pipe-noseat G in Fig. 3252, a crack is formed, which is continued round the neck by gently striking theblow-pipe, and thus the pipe is released, as seen in Fig. 3253. The cylinder has now one end offull diameter, but the other is contracted to about 3 in. diameter, Fig. 3253, and must therefore becut off. Tins is accomplished as follows ;—The cylinder havi
. Spons' dictionary of engineering, civil, mechanical, military, and naval; with technical terms in French, German, Italian, and Spanish . n placed upona wooden trestle, and by touching with a piece of cold iron the pear-shaped neck near the pipe-noseat G in Fig. 3252, a crack is formed, which is continued round the neck by gently striking theblow-pipe, and thus the pipe is released, as seen in Fig. 3253. The cylinder has now one end offull diameter, but the other is contracted to about 3 in. diameter, Fig. 3253, and must therefore becut off. Tins is accomplished as follows ;—The cylinder having become cold whilst remainmg onthe trestle, the workman collects a small portion of metal upon the end of an iron rod, and draws itinto a thread of glass about i in. diameter by means of a pair of pincers. This thread he passesround the body of the cylinder at H H, in Fig. 3253, and after it has remained on a few momentsthe pincers dipped in cold water are applied to the heated part, and the sudden contraction causesthe end to fly off with a sharp report, leaving the cylinder about 45 in. long and 11 in. diameter. 3252. ^1
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Keywords: ., bookcentury1800, bookdecade1870, bookidsp, booksubjectengineering
