. Scientific American Volume 59 Number 04 (July 1888) . are to be large and strong enough to holdback the waters, which may then be let down as theyare needed for the benefit of the reclaimed lands. Thecost of these irrigation works will be very great, but itwill be only a small fraction of the value of the land re-claimed. It is believed that by wisely utilizing thesurplus waters in the drainage area between the onehundredth meridian and the eastern slopes of the RockyMountains, an unproductive region equal to at leastfour times the area of New York State may be restoredto fertility. The deci
. Scientific American Volume 59 Number 04 (July 1888) . are to be large and strong enough to holdback the waters, which may then be let down as theyare needed for the benefit of the reclaimed lands. Thecost of these irrigation works will be very great, but itwill be only a small fraction of the value of the land re-claimed. It is believed that by wisely utilizing thesurplus waters in the drainage area between the onehundredth meridian and the eastern slopes of the RockyMountains, an unproductive region equal to at leastfour times the area of New York State may be restoredto fertility. The decided success of irrigation works inCalifornia, Utah, and Colorado indicates the methodsby which we are still further to reduce the profitlessarea which we formerly designated as the Great Ameri-can Desert; and the entire country cannot fail to feelthe benefits of improvements of such magnitude as toadd many millions of acres to our area of fertility andfree the Mississippi lowlands south of Cairo from thegreat hinderance in the way of their only from each end, but by sinking a shaft midwaytwo additional working faces will be provided, makinga total of four points of attack. The four sets of tun-neling plant required have all been supplied by , and amount in toto to eight locomotive typeboilers, four air compressors, with their receivers, fourcarriages of the type just described, and thirty-tworock boring machines, with all the accessories neces-sary for opening out the tunnel, the whole of the ma-chinery being carried out under the inspection of SirAlexander M. Rendel. We understand that Messrs. Schram are also supply-ing a complete installation for the driving of a tunnelone mile long in connection with the Perigar projectfor the Madras public works. In this, however, a tur-bine will be used in supplying the power to the com-pressors.—Engineering. * i ? i m A Small City on a Block. Work has been commenced on what may very wellbe called a small city,
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectcarboni, bookyear1888
