Scientific American Supplement, No. 470, January 3, 1885

Scientific American Supplement, No. 470, January 3, 1885

At a recent meeting in this city of the American Society of Civil Engineers, a paper by Edmund B. Weston was read, giving the description and result of experiments on the flow of water through a 2 inch hose and through nozzles of various forms and sizes; also giving the results of experiments as to the height of jets of water. The experiments were made at Providence, R.I. The water was taken from a hydrant to the head of which were attached couplings holding two pressure gauges, and from the couplings the hose extended to a tank holding 2,100 gallons, so arranged as to measure accurately the time and amount of delivery of water by the hose. Different lengths of hose were used. The experiments resulted in the following formula for flow from coupling: The annexed engravings illustrate a method of constructing subaqueous foundations by the use of iron pile planks. These latter, by reason of their peculiar form, present a great resistance, not only to the vertical blow of the pile driver (as it is indispensable that they should), but also to horizontal pressure when excavating is being done or masonry being constructed within the space which they circumscribe. Polygonal or curved perimeters may be circumscribed with equal facility by joining the piles, the sides of one serving as a guide to that of its neighbor, and special pieces being adapted to the angles. Preliminary studies will give the dimensions, form, and strength of the iron to be employed. The latter, in fact, will be rolled to various thicknesses according to the application to be made of it. We may remark that the strength of the iron, aside from that which is necessary to allow the pile to withstand a blow in a vertical direction, will not have to be calculated for all entire resistance to the horizontal pressure due to a vacuum caused by the excavation, for the stiffness of the piles may be easily maintained and increased by establishing string-pieces and braces in the interior in measure as the excavation goes on. ......Buy Now (To Read More)

Product details

Ebook Number: 14041
Author: Various
Release Date: Nov 14, 2004
Format: eBook
Language: English