ide. The meal is thrown from and formed with sloping sides to prevent the grains perly arranged pawl and ratchet wheel turn the wheel one side to the other twice during every revolution. hanging. Asthe cylinders are revolved, the holes receive when the drum is revolved by the drawing off of the The… … frame remove any soil that may adhere to the rims of ——_——9 +0 the wheels; this shaft is operated by a foot lever. GAS DETECTER FOR MINES. loosely placed fan inclosed in a circular casing fixed This invention has been patented by Mr. George 8. upon the shaft. The hub of the fan s formed with a This…
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![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-22-2.webp)
