Annual report of the State Mineralogist for the year ending ... . Its advantages, as compared with the Rittinger table of the samecapacity, consist chiefly in its cheapness, the small expense requiredfor its foundation and erection, and, lastly, in quite a considerable savingof space and power. Its working plane is inclosed by a longitudinal four-cornered frame,at the ends of which are fitted movable rolls. The space between them 818 REPORT OF THE STATE MINERALOGIST. is taken up by a solid table Q. The frame is suspended by the beamsand screens i i between the standards p p, and is movable in
Annual report of the State Mineralogist for the year ending ... . Its advantages, as compared with the Rittinger table of the samecapacity, consist chiefly in its cheapness, the small expense requiredfor its foundation and erection, and, lastly, in quite a considerable savingof space and power. Its working plane is inclosed by a longitudinal four-cornered frame,at the ends of which are fitted movable rolls. The space between them 818 REPORT OF THE STATE MINERALOGIST. is taken up by a solid table Q. The frame is suspended by the beamsand screens i i between the standards p p, and is movable in such a Fi£. manner that any desired inclination towardthe front may be given to it and the the stationary table Q is spread an end-less plane or belt of rubber cloth, forming theworking surface of the buddle. In order to prevent the belt from stickingto the table, diagonal gutters d are cut in thelatter, whereby water is applied which formsa thin sheet or film between the table and theplane. This is one of the recent impelling force which causes the planeto move is applied to one of the end percussion of the frame and plane is effected by means of thethumbscrew r, which draws the frame to one side, thereby compressingthe spring n. When the thumb lets the frame slip, the spring causes asudden rebound and shock of the frame against the check t placed onthe inside of the opposite standard. It is best to regulate the glidingon of the belt or plane to millimeter per second and the percussionto one hundred and fifty per minute. Slipping of the plane from the i
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Keywords: ., bookcentury1800, booksubjectgeology, booksubjectminesandmineralr
