This begins somewhat below a red heat and increases in rough proportion to the temperature and the duration of the heating.
Soldering at a red heat by means of spelter is called brazing.
Consequently, it is better to reduce it by igniting at a red heat in a current of hydrogen and to weigh it as metallic cobalt.
One hemisphere, forever in sunshine, remained in a low, red heat.
It was a flat surface, with four holes which showed the red heat below, and looked like little volcanoes in a good temper.
This agrees with what I had before observed with a red heat.
Wash the precipitate, dry it, and expose it to a red heat in a platina capsule: it is phosphate of magnesia.
At a red heat its salts part with some of their acid; at a white heat, most of it, if not all:—9.
The art of brazing is applied to metals which will withstand a red heat, and the joints so soldered have the strength of brass.
All, with the exception of those of the alkali and earth metals, are decomposed at a red heat in a current of hydrogen.