. Machinery and processes of the industrial arts, and apparatus of the exact sciences. ich is single at the base, and whichforms a vertical axis around which the supply shoot has the slightlateral movements above described, which change the manner of deliveryof the grain. It is obvious that this balance is applicable to many purposes in whichaccurate and continuous weighing is necessary, as well as to the weighingof grain. UNIVERSAL EVAPORATOR. Under this name Mr. Chenailler, of Paris, exhibited an apparatus foraccelerating the evaporation of liquids at temperatures below the boiling-point, wh
. Machinery and processes of the industrial arts, and apparatus of the exact sciences. ich is single at the base, and whichforms a vertical axis around which the supply shoot has the slightlateral movements above described, which change the manner of deliveryof the grain. It is obvious that this balance is applicable to many purposes in whichaccurate and continuous weighing is necessary, as well as to the weighingof grain. UNIVERSAL EVAPORATOR. Under this name Mr. Chenailler, of Paris, exhibited an apparatus foraccelerating the evaporation of liquids at temperatures below the boiling-point, which seems to be capable of useful application in many industriesrequiring a rapid concentration of dilute solutions without urging thetemperature. Such is especially the case in the manufacture of sugar;and accordingly it is stated that this apparatus has been extensivelyintroduced, not only in the beet-sugar factories of France, but also amongthe planters of cane in the French colonies. The apparatus consists of anumber of hollow disks, of lenticular figure, arranged upon a common. 278 PARIS UNIVERSAL EXPOSITION. axis, and dipping into the liquid to be evaporated. These disks, or lenses,are constructed of thin metal, and are all in communication with eachother through the common axis, which is likewise hollow. The wholesystem is kept in slow rotary motion by some convenient moving power,and each disk carries up with it, adhering to its surface, a thin film ofthe liquid. As evaporation when it takes place without ebullition goeson with a rapidity proportional to the surface exposed, (the temperaturebeing supposed constant,) it is manifest that the arrangements heredescribed will increase the amount evaporated in a given time to a degreedependent on the number of the disks. The disks exposed were abouta metre in diameter, and were ten in number in each set. In addition tothe disks, one of the sets was provided with a series of longitudinal tubesextending parallel to the axis fro
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