Page:Popular Science Monthly Volume 40.djvu/178

166 The revolving plate at which the potter sat was often ten or more feet from the crank-wheel, and the apparatus was therefore cumbersome, besides requiring the services of an extra hand. This contrivance was a great improvement over the old method of turning, as it secured uniformity of motion and enabled the operator to devote his entire attention to his work. This style of wheel, in time, was superseded by the more simple form which is worked by a treadle with the left foot of the operator, and is still used in many of the smaller potteries. The subjoined engraving



represents one of these "kick" wheels, as made at the present time by Messrs. Taplin, Rice & Co., of Akron, Ohio. This firm also manufactures a power-wheel such as is now operated in the larger factories, which is so constructed that the velocity can be regulated by a foot-lever.

The old methods of grinding and mixing clays by hand have given place to improved mechanical processes. In olden times it was customary for one or two men to manipulate the clay, which was placed in a square tank sunk in the floor, with a wooden shovel or paddle. Now this work is performed much more effectively and rapidly by special machinery known as "blungers," "pug" and "grog" mills, etc. Some of the improved grinding mills have a capacity of twenty-five tons or more per day, and the agitating and mixing machines perform the work of many men.

I have in my possession a drawing of the old-fashioned slip kiln used by Messrs. Tucker & Hemphill in 1832. This consisted of a long horizontal brick fire-box, at one end of which were built three partitions or pans, one after the other. In these the slip was poured, and flues passing around the sides furnished the heat necessary to dry the clay to the proper consistency. This drying process was necessarily a slow one. The contents of the pan nearest the fire-box would be ready for removal first, and