Gasoline furnace used in dentistry, 1903.

Fig. 208. Gasoline furnace manufactured by Dr R C Brophy of Chicago, especially designed for crown and bridgework in dentistry. Fig. 209. The Turner gasoline furnace, manufactured by the Turner Brass Works of Chicago, is similar to the above, except that the nickel muffle is exclusively used. Page 267, 'Principles and practice of crowning teeth : a practical, systematic and modern treatise upon the requirements and technique of artificial crown work, including some incidental reference to bridgework' by Hart John Goslee, 1903.