Licence: Public Domain Mark
Credit: Dental mechanics / by Harry Rose. Source: Wellcome Collection.
Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.
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![ASH'S FULL-SET DRAUGHT GAS F\]RliACE-contmued. Directions for Use: The Burner should be lifted out of the Furnace, lighted outside and then put back ; on no account should it be lighted from the top of the Chimney. It should be turned full on from the com- mencement of firing. The work can be observed during the firing through the slit in the door. When the firing is completed the Furnace should be al- lowed to cool down before the work is taken out. Important. By a half-inch gas supply and clear-bore taps (see previous page) we mean that the inside of the gas-pipe must be a clear half-inch in diameter, and that the bore inside the taps must be of the same diameter right through. About one-third size.](https://iiif.wellcomecollection.org/image/b21449727_0489.jp2/full/800%2C/0/default.jpg)