Journal of the Franklin Institute; devoted to science and the mechanic arts (1826)
Franklin Institute (Philadelphia, Pa.) · Oxford, Eng. [etc.] Pergamon Press [etc.] · leaf 795
The tube gauge is shown in the annexed figure, iv x is-a tube of green glasspassing into the stuffing boxes, xv xthe stuffing enables an adjustment to be madefor the unequal expansion of the glass and metal by heat, and prevents fracture on thesubsequent cooling of the apparatus, y and z, are pipes… … stop-cocks: coupling screws might, in practice, be substituted for these conical termi-nations. To protect the tube, w xt from currents of air, it was surrounded by a secondtube, loosely applied. A scale was attached to w x, to indicate the level of the waterwithin the boiler. Report on the…
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