fifteen feet horizontal and about three the ScrENTIFIC AMERICAN and SUPPLEMENT of December high pressure in this boiler 24 and 81. As then stated, (having no diaphragm or man- the object is to define the na- hole, but in all other respects ture of the causes of boiler like the patent one), it had… … when a last shock was given ers, thirty inches diameter by without producing an explo- six feet long, the shell of two sion. The diaphragm was plates of three sixteenths inch then cut out except a margin all round, through which the rivets passed, about three inches wide (see Fig. 5). The main by a…
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