File:The fireside university of modern invention, discovery, industry and art for home circle study and entertainment (1902) (14798898013).jpg

Identifier: firesideuniversi01mcgo (find matches)
Title: The fireside university of modern invention, discovery, industry and art for home circle study and entertainment
Year: 1902 (1900s)
Authors: McGovern, John. (from old catalog)
Subjects: Science
Publisher: Chicago, Union pub. house
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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ecrease, leaving it clean. As the stream of wheat leaves thisdrum it pours over an electro-magnet,which attracts all particlesof iron, such as wire, or harvester and thrasher belongings. Is it now clean? Yes, and that is the main difference between the old and thenew methods. The clean wheat is now to pass through groovediron rollers, one of which goes faster than the other. The linesor strings on these rollers are like those on a screw, and thewheat is broken lengthwise. The first set of rollers is compara-tively coarse and set far apart ; the series progresses in fineness.A very little break flour results, of a cheap grade. Next wecome to the centrifugal machines, so when you hear ofcentrifugal Flour you may know the source of the term. Thecrushed wheat goes to the centrifugals to be scalped. Thewheat is poured on these reels, and they, by rapidly revolvingdash it away from their centers, casting it against wire screensand silk gauze, and grading it according to the size of the mesh
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BREAD, ETC. 115 through which it escaped. It is now middlings. A Germanmachine called a plane-sifter, by eccentric motion and jarring,does the same work with less force. What is the Middlings Purifier ? It is a blast of air. Before that blast the streams of variouslygraded middlings pass, and the bran is blown into its ownreceptacle. The process now begins all over again from therollers or crushers, and is repeated until there have been fiveoperations. The flour then goes into barrels or sacks. Thebran, however, after getting into the air blast, is passed througho. machine which brushes it in search of flour. I have heard of mill explosions. What are they ? There was an explosive force in the flour dust, either whenlighted by a flame, or under certain kinetic (or moving) circum-stances. It is believed that the modern ventilating fan, byrevolving, draws this dust from the air in sufficient quantity torender the repetition of these calamities impossible. The flouris collected in a chamb

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