THE BLACKSTONE AND ELMER WATER WHEEL. The rack and pinion G for governing the gates are placed at a distance from the wheel to avoid wearing or clogging by in contact with any of the pulleys or gears that may be on the wheel shaft. These arrangements do not have to be re moved in case a wheel is taken up. The spider is placed on the outside of the case thus preventing the wheel from be ing broken in case the step should chance to wear down. Two wheels are made for each size No. 1 it is claimed utilizing ninety per cent of the effect of the passing water and No. 2 eighty-six per cent. The patents under which the device is constructed are dated April 8 1873 and March 24 1874. For further parti culars address the manufacturer Mr. C. C. Paige Eagle Iron Works Oshkosh Wis. SCIENCE is the trunk of a mighty tree the roots of which penetrate into the unknown and the branches flourish in the useful arts. Rat Science vs. Alligator Strength. c A Squirrel's Leap. Dangers of Elm Trees. bough alarmed by the second crack ran away and thus saved IMPROVED HAND CRANK DRILL. Is THE BLACKSTONE AND ELMER WATER WHE I lifill EL., scientific american, 1874-08-29
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