tion, and that it is used on the work before any set has occurred.

Fourth. See that all joints are thoroughly flushed with mortar, and that no voids are left anywhere in the masonry.

Fifth. See that. all coping-stones are set so that the top of the pier will lie in a truly horizontal plane, and that they are kept in place by proper clamps and dowels as per plans.

Sixth. See that the exposed joints are all cleansed and pointed in a thorough and workmanlike manner, and in accordance with the specifications.

(K) GENERAL INSTRUCTIONS.

First. See that all proper precautions against accidents to the public and to the workmen be taken during erection, and that no glaringly careless man be allowed on the work.

Second. If there be more than one Contractor on the work, see that no friction arises between contractors, and that their combined work is finished in good shape.

Third. While doing everything in your power to obtain good work, avoid as much as possible worrying or harassing the Contractor, and use every legitimate endeavor to aid him to complete his work expeditiously and inexpensively.

Fourth. Finally, and in short, study the specifications carefully, and do all that you can to insure the structure's being in every respect a credit to all concerned in its designing and construction.

In respect to the testing of cement on construction work, the following instructions, which the author has prepared for his resident engineers, will give the reader all necessary information, it being understood that no brands of cement are ever used except those which either the author or his assistants have previously tested thoroughly by long-time tests, and which lave proved to be perfectly satisfactory:

First. In testing cement, in the field, remember that it is not a series of laboratory tests which you are to make, but that your object is simply to see that you are receiving and using cement of an average quality of the standard brand or brands