both sets of weights must be sent to the Engineer upon the completion of the contract, or, at his request, upon the completion of any definite portion thereof.

Nineteenth. The inspecting bureau shall, under no circumstances whatsoever, intrust responsible work of any kind to insufficiently trained assistants. When new inspectors are to be broken in, they must receive their training in such a way as not to jeopardize in the slightest degree the quality of the material or workmanship.

Twentieth. Finally, and in short, do all you can to make the structure in every sense of the word a credit to all concerned in its designing and construction.

The author has had made for him lately by Mr. R. T. Lewis, one of his inspectors, a rather interesting series of tests to determine the average accuracy of punched rivet-holes. These tests were made after the metal was assembled for reaming by inserting rods of various diameters in the assembled holes. From the results of these tests the author has prepared the following clause for the specifications given in Chapter XVIII.

All punched work shall be so accurately done that, after the various component pieces are assembled and before the reaming is commenced, forty (40) per cent of the holes can be entered easily by a rod of one sixteenth (1/16) of an inch less diameter than that of the punched holes; eighty (80) per cent by a rod of a diameter one eighth (1/8) of an inch less than same; and one hundred (100) per cent by a rod of a diameter one quarter (1/4) of an inch less than same. Any shop-work not coming up to this requirement will be subject to rejection by the inspector."

It will be noticed that this specification does not reject absolutely all work that does not come up to its exact requirements, the inspector being allowed some latitude in distinguishing between simple and complicated shop-work, important and unimportant connections, and the assembling of few and of numerous component pieces.

If the Association of Inspectors herein suggested were established, it could do good work for the engineering profession by laying out a series of tests of full-sized members and details