Book Description

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. 1922 edition. Excerpt: ... rolled with their rollers, as they were always in order. Young Abbey (he was only about fourteen, perhaps younger) asked why they chose that coin? Then he consulted with Mr. Bull and suggested that they try pure gold. Mr. Bull liked the suggestion and had a sample prepared, and it proved so superior that they entered into its preparation as a business. The demand was so great and increasing, that in 1817 they moved to Philadelphia, then the commercial center of the United States, and very soon Bull's dental gold had a worldwide market. At first gold was inserted in the form of pellets, being pierced in the center, and more gold added until the filling was firm. There was also a variety of other methods for inserting it. In October, 1846, Dr. C. T. Jackson, of Boston, had a tooth filled with sponge gold, made by a process which he had discovered. Dwindle was really the first to call attention to the possibilities of working gold adhesively (cohesively). Dwindle also introduced contour filling.1 A form of gold was introduced from England, about 1849, in small pellets composed of sand-like particles, but it was difficult to use. Then followed Watt's first "sponge" gold that made quite a furore in 1853, and next a form of crystal gold made by an electrolytic process. This suggested to Dr. Robert Arthur, of Baltimore, that the same might be done with foil. Louis Jack, who was his assistant, tried the experiment that Arthur suggested and found that annealed foil could be welded. In the spring of 1855, Dr. Arthur announced the use of cohesive gold-foil for filling purposes. It has recently been claimed that Dr. Westcott, of Syracuse, discovered the cohesive properties of gold and lectured on the same at the Baltimore College of Dental...