EMERY MINE OF CHESTER, MASS. 43 



the author had occasion to study, a mica constituting a new 

 species, and one well determined. 3. Finally that he has 

 given a means for determining the qualities of emery, and 

 consequently their commercial value. This process, eminently 

 practical, offers besides an interest in a scientific point of view, 

 inasmuch as it permits of determining the difference in the 

 tenacity of minerals of equal hardness. These researches of 

 geology, mineralogy, and of analytical chemistry constitute a 

 work of the highest interest, both as a whole as well as from 

 the new facts they promise to science. Your committee con- 

 sequently propose to thank Dr. Smith for having communicated 

 them to the Academy, and in consideration of the importance 

 of the work, to order the insertion of his paper in the Receuil 

 des Memoir es des Savants etr angers." 



At that time I had discovered six new localities of emery in 

 Asia Minor and the Grecian Archipelago. Those localities 

 were far removed from each other, and furnished so many 

 different places for the study of emery and its associate min- 

 erals in addition to the old locality of JSTaxos ; and consequently 

 many points of general interest were brought out, besides others 

 connected with the line of study. Those who may feel^ inter- 

 ested in the subject will find the investigation and results 

 there arrived at in the American Journal of Science and Arts, 

 Yols. X. and XI., 1850 and 1851 ; they embrace the geology, 

 mineralogy, chemical composition, manner of mining, commer- 

 cial considerations, associate minerals, etc. 



The study of the associate minerals I considered of great 

 importance, as they would be guides in future explorations in 

 other parts of the world ; and even prior to completing the 

 researches on the subject I wrote to Professor Silliman and 

 asked him to examine the American corundum localities for 

 these minerals, one of them in particular, which he immediately 

 did. With the corundum from the locality in Chester County, 

 Pennsylvania, and Buncombe County, North Carolina, he "soon 

 found the mineral indicated," and communicated the same to 

 the American Journal of Science and Arts, November, 1849, 

 pp. 379 and 383. 



Nothing further came to my notice in relation to emery 

 until I received from Prof. C. T. Jackson a letter dated October 

 9, 1864, containing what follows : " You discovered emerylite 



