hen necessary.It is fitted with pilot light and with an adjustable valve, whichenables the regulating of burner for any pressure of gas. This heater is furnished with cast iron or polished steelcasing so constructed that the loss of heat through radiation isreduced to a minimum. As shown in cut,… … Circulating Water Heater
![An illustration from Catalogue and price list of the Supply Department [serial] (1911)](https://img.insideoutlibrary.com/img/200/ia-cataloguepriceli00asso-16-13.webp)
