that they apply only to stone from quarries that have been previously investigated and found satisfactory:

First. Reject all stone containing any dry seams. These seams are often very hard to detect; but usually by a careful inspection of the surface of the stone they may be found. Sometimes a mere line is all the evidence of the existence of such seams, while in other cases they show more plainly.

Second. Reject all stone containing seams called "crowfoot," which are either open, or which are liable to dissolve out after exposure to the weather.

Third. See that no stone is quarried at a time when it is liable to freeze before the quarry-sap is out of it. Stone should be quarried at least a month before it is allowed to freeze.

Fourth. See that no powder or other explosive is used in quarrying the stone, excepting to remove ledges of useless stone, and even then make sure that no stone to be used is injured by the explosives.

Fifth. If the stone be of such a character that the quarry-bed cannot be told at a glance, the Inspector must mark each stone in such a manner that it will be sure to be laid in the wall on the said quarry-bed.

Sixth. Reject all stone which is taken from any portion of the quarry that is affected injuriously at any time by frost.

Seventh. See that all stone is handled carefully after being taken from the quarry, so that no cracks are developed or other injury done thereto by rough usage.

Eighth. See that all stones are cut to the exact dimensions called for by the plans, and that they comply in every particular with the specifications.

In respect to inspection of timber, both in the woods and at the sawmills, the author's instructions to his timber-inspectors, as follows, will be found useful:

First. Study well and compare with the mill people all order-bills, looking carefully to the various lengths, widths, thicknesses, bevels, numbers of pieces, etc., so as to make sure that your order-bills check properly against those furnished to the mill people and against the partial order-bills furnished