Practical dental metallurgy / by Thomas Fletcher.

  • Fletcher, Thomas
Date:
1881
Catalogue details

Licence: Public Domain Mark

Credit: Practical dental metallurgy / by Thomas Fletcher. Source: Wellcome Collection.

    56/268 page 26
    is all that could be desired. Roasting and cupelling may also be done in the muffle furnace, Fig. 61, pro- vided a slit is cut in the back of the muffle so-as to allow a current of air to pass through. Fig. Gl. For the Fusion of all Metals in Crucibles, and more especially for those metals fusing at high tem- peratures, the injector furnace, Fig 41, is the, simplest and most powerful. This requires a blast of air from a good foot blower. Fig. 41.
    digitised image 1
    digitised image 2
    digitised image 3