Scientific amusements . water as the unit. Substance. SpecificGravity. 1 Substance. SpeciricGravity. Substance. Platinum . 21-5 Iron . 779 Water IOOO Gold . 19-5 Tin . 7-29 Sea Water . 1-026 Mercury i359 j Granite 2-62 Rain Water I-001 Ltad . 11-45 1 Oak Wood. 077 Ice . •916 io5o ; Cork . 0-24 Ether . 0-723 Copper 8-96 Milk . I 032 Alcohol 0-793 But we have by no means exhausted the uses of , which is the alternative term for hydraulics,includes the consideration of many forms of water-wheels,most of which, as mill-wheels, are under-shot, or over-
Scientific amusements . water as the unit. Substance. SpecificGravity. 1 Substance. SpeciricGravity. Substance. Platinum . 21-5 Iron . 779 Water IOOO Gold . 19-5 Tin . 7-29 Sea Water . 1-026 Mercury i359 j Granite 2-62 Rain Water I-001 Ltad . 11-45 1 Oak Wood. 077 Ice . •916 io5o ; Cork . 0-24 Ether . 0-723 Copper 8-96 Milk . I 032 Alcohol 0-793 But we have by no means exhausted the uses of , which is the alternative term for hydraulics,includes the consideration of many forms of water-wheels,most of which, as mill-wheels, are under-shot, or over-shotaccordingly as the water passes horizontally over the floats,or acts beneath them. These wheels are used in relationto the fall of water. If there is plenty of water and aslight fall, the under-shot wheel is used. If there is a good 128 WATER. fall less water will suffice, as the weight and momentumof the falling liquid upon the paddles will turn the is the Persian water-wheel, used for irrigation. The. Archimedian Screw, called after its inventor, was one ofthe earliest modes of raising water. It consists of a cylindersomewhat inclined, and a tube bent like a screw within it. WATER-MIT,!,. 129 By turning the handle of the screw the water is drawn upand flows out from the top. The Water Ram is a machine used for raising water toa great height by means of the momentum of falling water.
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Keywords: ., bookcentury1800, bookdecade189, booksubjectscientificrecreations
