Gilpin County Black Hawk Mill Works Gold Mining Rittinger Table Colorado 1870

This print is out of a very rare book, Report of the Geological Exploration of the Fortieth Parallel. Clarence King Geologist, Volume III, Mining Industry by James D. Hague. Government Printing Office 1870.

Plate, XXXIV. Rittinger Table, Some experiments were made last summer, at the Black Hawk mill, with the view of adopting improved concentrating machinery. A Rittinger percussion table was constructed and set up outside the buildingThe following description of this percussion table is taken from Von Rittinger's Lehrbuch der Auf bereitungskunde. 1 The drawings on Plate XXXIV, copied from the Atlas accompanying the above-named work, show the details of its construction. Fig. 1 is a front elevation of a double table ; Fig. 2 a plan ; Fig. 3 a side view; Figs. 4, 5, and 6 show other details, to be noticed further on. This apparatus consists of a wooden table, or platform, about four feet wide and eight feet long, which is suspended by iron rods at the four corners, as shown at b, b, Figs. 1, 2, and 3, presenting an inclined plane, over which the water and material, supplied at the upper end, may How evenly toward the lower end. The table is so hung as to move freely, in a lateral direction, when acted upon by a cam, c, and may be thrown back by the action of a spring, d, so as to strike forcibly against a timber, e, firmly imbedded in the ground, by which means a shock h imparted to the table and the material

Size 8 1/2" X 11 1/2".

Condition: Crisp and clean. Once framed this map will be an excellent example of a historic print that is 150 years old.

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