Annual Report of the Commissioner of Public Roads, Volumen5

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Página 137 - ... his servants or agents, in the construction of said work, or by or in consequence of any negligence in guarding the same, or any improper materials used in its construction, or by or on account of any act or omission of the said contractor or his agents...
Página 175 - ... corrected and revised, or a new report to be made by them In the premises to the said court without unnecessary delay; and the same, on being so returned shall be confirmed or again referred by the said court In manner aforesaid, as right and Justice shall require, and so from time to time until a report shall be made or returned In the premises which the said court shall confirm, and such report when so confirmed by the said court, shall be final and conclusive...
Página 69 - ... ceases entirely, and the narrow tires pull materially lighter, (e) Clay road, surface dry, with deep ruts cut by the narrow tires in the ordinary use of the road. In every trial, the first run of the broad tire over the...
Página 68 - The net load was in every trial the same, viz., 2,000 pounds. Contrary to public expectation, in a large majority of cases the draft was materially less when tires six inches in width were used than when the tests were made with tires of standard width — one and one-half inches.
Página 56 - ... of the cylinder. At the end of five hours, or 10,000 revolutions, the machine is stopped, the cylinder opened and the contents emptied into a basin. The cylinder and the cover are carefully washed, and the water used is poured into the basin.
Página 69 - ... pounds on the narrow tires. In this condition of road the broad tires show to their greatest advantage. As the road dries and becomes firmer, the difference between the draft of the broad and narrow tires gradually diminishes until it reaches about 25 to 30 per cent, on dry, hard smooth dirt, gravel or macadam road, in favor of the broad tire. On the other hand, as the mud becomes softer and deeper, the difference between the draft of the two types of wagons rapidly diminishes until the condition...
Página 172 - All highways improved under the provisions of this act shall require the construction of a macadamized road, or a telford or other stone road, or a road constructed of gravel...
Página 131 - All stone must be as nearly cubical as possible, broken with the most approved modern stone-crushing machinery, free from all screenings, earth, and other objectionable substances, of uniform size, and the same kind and quality, or as good in every particular, as that shown in the engineer's office.
Página 69 - Where the ruts were eight inches deep, with rigid walls, three runs of the broad tire in its own track over the ruts were required to eliminate the disadvantage. Three runs of the broad tire over this track have in all cases been sufficient, however, to so improve the...
Página 68 - When the surface was covered with two or three inches of very dry, loose dust, the results were unfavorable to the broad tire. The dust on the road in each of these trials was unusually deep, (c) On clay road, muddy and sticky on the surface and firm underneath, the results were uniformly unfavorable to the broad tires, (d) On clay road^ with mud deep, and drying on top, or dry on top and spongy underneath, a large number of tests showed uniformly favorable to the broad tire. The...

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