ground before sowing, which is so im- BT JACQUES BOYER. by the colors of colloidal solutions of gold was com- portant, especially in the cultivation of beets. An automobile hoe, or cultivator, represents a recent menced, and pursued with some success, by Faraday, application of automobilism to… … Fig. 1.—The automobile hoe in operation. tensity of the light dif- photographs (Fig. 2). On fracted by the solutions the axis of the flywheel are determined. The po- and almost surrounded by larization of the light is its rim is a conical fric- next studied with the tion clutch, so constructed…
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