Contains the proceedings of the Michigan Engineering Society.

Contains the proceedings of the Michigan Engineering Society.

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1890 edition. Excerpt: ...top, it will keep straight much longer than a stick turned in a lathe. I do not know of any way, however, that one can be made which will never warp or bend. The shoe should be made of sufficient size to receive the stick, without dressing it down to go into the socket. Several trials will have to be made before they can be fitted to each other correctly. When finished it should be thoroughly tested, to see if the point of the shoe has been set in line with the center of the pole. To make this test, suspend a plumb bob from a point in a ceiling, and mark on the floor the point carried down. Fasten a string in the center of the top of the color pole and suspend it from the same point. If the point of the shoe covers the mark on the floor it is all right. Prying with a color pole should be prohibited. These remarks about the head chainman and color poles may seem extended and to deal with tiresome details, but it is exasperating to a trained man to take a good transit into the field, use care in keeping it in adjustment, and then have all of his pains go for naught, on account of a "chump" or a crooked stick. A friend of mine exhausted his patience and his supply of men, trying to find one who could do the simple act of holding a color pole plumb, and as a last resort, had one made with a shoe so heavy that a man with ordinary strength could not hold it in any other position. Sights should be equal in length if possible. None of them less than 200 feet, and of as great length as signals can be seen and understood. Hard winds and refraction make work very uncertain. Clear, cool days are the most favorable for fine running. A man may select the best transit, a well-trained head chainman, a perfect color pole, and use every...