When any art or manufacture begins to assume importance, and there is a continually increasing demand for the articles, be they what they may, that are made by those

who are engaged in it, it has been invariably found that in due proportion to its growth the art or manufacture, as the case may be, becomes divided and even subdivided into many and various branches, until it is well-nigh impossible to carry the subdivision of the trade to a greater extent.

The building trade is an aggregation of various trades and their separate departments, which have become affiliated, as it were, and grouped together for the better attainment of the end desired.

Taking each a prominent and active part in the building trade we find the excavator, bricklayer, mason, pavior, slater, plasterer, carpenter and joiner, sawyer, ironmonger, smith and founder, zinc-worker, wire-worker, bell-hanger, gas-fitter, plumber, painter, decorator, gilder, paper-hanger and glazier

a goodly array of tradesmen and artisans whose aid and cooperation is absolutely necessary in building and finishing a house.