The list given is not intended to be in any sense so complete as to be a sufficient guide to work in all buildings. It is inserted to illustrate the scheme often used in offices where the specification writer is somewhat unfamiliar with the work already laid out on the drawings. Practice differs so radically, and the range of building is so wide, that a comprehensive list, covering all the multiplicity of questions that arise in connection with buildings, would be cumbersome. But, following the lines above laid out, each specification writer can rapidly accumulate what he needs in his particular line; and the operation of seeking for new items of importance in practice will be a source from which much valuable information and experience will be obtained.

Practice for the Student. Before proceeding, the student should prepare a schedule along the lines suggested above, but specifying under each heading at least double the number of subitems mentioned.

He should also write a description of the character of work referred to by each heading, these descriptions each to contain approximately one hundred words. Below is given a brief description of the subject of "Heating," which will serve to illustrate the work the student should do:

HEATING

There are five principal methods of heating dwellings-namely, by fireplaces, by stoves, by furnaces, by steam boiler, and by hot-water boiler-all adapted to fuels in common use.

Fireplaces are suitable in mild climates, and to supplement more efficient apparatus in cold climates.