ABSTRACT
Alternatively, the temperature of the large, loose ame of a spirit lamp placed near the cylinder or ball of lime was raised by a jet of oxygen and the ame was forced alongside the surface of the lime. is arrangement did not require any hydrogen. It was called oxy-calcium lamp. In this ame, the ow of oxygen had to be carefully regulated. A large quantity of oxygen cooled the lime, reducing the luminous output. Less oxygen was insucient to heat the lime to incandescence.
