If a gas furnace is not on the bench to heat the iron, then a gasoline furnace is necessary.
The plate is then raised to a welding heat in a gas furnace, and transferred to an iron flask or mould.
For higher temperatures the bulb of the vapour density tube is made of porcelain or platinum, and is heated in a gas furnace.
After covering all the exposed steel surfaces with ganister, the plates are put in a gas furnace and heated to a welding heat.
Even in a gas furnace a very hot flame is usually an oxidizing flame.
The ring thus prepared was placed in a cast-iron box and heated in a gas furnace.
It is also seen in the Siemens gas furnace, with which you are doubtless familiar.
In 1886 he produced metallic sodium by mixing caustic soda with iron and charcoal in an iron pot and heating in a gas furnace.