). These ingre- engraving. The boiler, as shown, embodies some slight im- dients being intimately mingled are introduced into a steel provements in details, the water tubes, C, having been short- mold capable of withstanding a pressure of 300 atmospheres, ened, the smoke flues, D, lengthened, and… … increased. One of the water tubes is shown separately at the left of the engraving. ends of said cans to rest upon the lower side flange, b’, as We are indebted to the Polytechnic Review for the engra- they are rolled along said track. The track, B, is slotted in vings. the lower side of its middle…
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![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten19unit-1056-0.webp)
