The shape and dimensions of the simple carburetter have been changed for the better by introducing pans which overflow from one to another when filling. The required superficial surface is obtained in a much smaller case in this way. There is no method, however, of determining the necessary relative capacity of the pans; and transfer cocks, pump pipes, etc., have been resorted to - first, to replenish a pan if it becomes empty, and then to get the heavy residual product into one place where it can be pumped out. This form of machine requires a pit so that one can get down to the cocks and connections. A good form of pit construction is shown in Fig. 136.

Carburetters of nearly every make are placed in the ground, with or without pit, and are required by insurance companies to be at least 30 feet from any building. In some machines, mixers are employed to mix part of the air directly from the pump with the gas after it passes through the carburetter. The proportion of air thus mixed can be varied at will according to the quality of light desired. This feature is intended to make the use of ordinary coal-burners possible. The prices of machines constructed of the same material are a fair gauge of their relative merit.

MODERN BATHROOM SHOWING EXCELLENT ARRANGEMENT OF FIXTURES;.

IN SMALL SPACE

Courtesy of the J. L. Mott Iron Works, New York City