This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1833 edition. Excerpt: ...found in the lower sand rocks. In boring the wells, one bed of coal is usually passed in the first one hundred and fifty feet, varying in its thickness from two to six feet. The salt water rises in the heads or "gums" to near the surface of the river at low water, but not so uniformly, nor so certainly, as it did ten or twelve years past, serving to imply that the gas, finding so many outlets, had diminished in its upward pressure. Since that period, recourse has therefore been had to "suck or force pumps," to aid the rising of the water into the heads or cisterns. Little, if any, difference is found in the strength of the water, whether a well has lain idle for a few weeks, or whether it has been kept in constant nee. Neither has there been any perceptible change in that respect, in the course of twenty four years, the period of time since the manufacture commenced, proving the sources of supply to be vast, if not inexhaustible; in as much as the quantity made has, for several years, been more than one million of bushels per year. The process of manufacturing salt is the same with that pursued on the Muskingum, which is fully described in this paper. In the course of the last season, the manufacture of alum or coarse salt has been commenced upon new principles and with flattering success. It is thus described in the 'Kenhawa Banner. "The manufactory now in operation consists of a large pan, about thirty five feet long, set in a furnace, and is closely sided up and covered over, so as to prevent the escape of any portion of the steam evolved. Connected with this furnace, is a vat, made of plank, one hundred and thirty five feet long and sixteen feet wide, underneath and along the bottom of which is a trunk, sixteen inches square, of...