Homcsiic. 4GS 



'erystals. The substance was analized by Dr. J. W. Web- 

 ster, of Boston, and proves to be the "Prismatic Titanium 

 ©re of Mohs, the Sphene or Titane siJiceo calcaire." He 

 thinks there is also an oxide of Titanium in the rock. 



6. Cyanite. — A specimen of it was brought in town a 

 short time since, by the person who owns the place where 

 it is found. He thought it contained silver or platina. 

 Nothing however was known concerning its situation. In 

 company with Mr. Amos Binney, jr. of Boston, I visited the 

 place about three weeks ago. It is found on a Mr. BJan- 

 chand's land, in Foster, R. I. about twenty-one and a half 

 miles south-west of Providence. It was first observed by him 

 three years ago, while engaged in digging a water-course for 

 a gri-.E-mill. The specimens that we obtained had been 

 weathered for some time. Some of the specimens were 

 contained in quartz ; other pieces appeared to be compo- 

 sed entirely, or in a great measure of Cyanite, held together 

 by the intervention of small quantities of quartz. It occurs 

 in long lamellar masses, and in masses that bear evident 

 signs of irregular crystallization. Its colours are, a fine deep 

 blue, a pale blue, and a pale green. Some pieces have a 

 ■strong pearly white lustre, and are covered with beautiful 

 blue stripes. There is a layer of black mica slate accom- 

 panying it. 



It is an uncommonly beautiful mineral. — Editar. 



1 3. American Geological Society* 



The Cabinet of this Institution continues to receive valu-- 

 able additions. A second collection of European rocks has 

 been received from its President, William Maclure, Esq. 

 and this gentleman, in addition to the books formerly men- 

 tioned, (Vol. III. pa. 360,) has recently forwarded to the So- 

 ciety's Library eleven Vols, of the Revue Encyclopedique, 

 from its commencement in January, 1818, to September, 

 1821; also, Vols. 89—90—91 and 92 of the Journal de 

 Physique, with the four last numbers of Vol. 37. 



The volumes from 54 to 87 wanting to complete this 

 Journal, will be forwarded as soon as they can be obtained. 

 Valuable boxes of minerals, chiefly rock specimens, have 

 been received from Professor Olmstead, of Chapel-Hillj 



Vol. V. 52 



