282 



Mr. Alger presented specimens of Sulphate of Strontium 

 from Lockport ; Dogtooth spar on Sulphate of Barytes ; and 

 Pyrites on Anthracite coal, from Little Lehigh River. 



Dr. C. T. Jackson exhibited to the Society a number of 

 curious artificial minerals, which were found crystallized in 

 the slags of an iron furnace in Pennsylvania, by Charles 

 Jackson, Jr., Esq. of Boston. 



The forms of the crystals were rhombohedrons, hexahedral 

 prisms, and right rhombic prisms. Some of them were trans- 

 parent and colorless, resembling in appearance Chabasie, others 

 resembled phosphate of lime, and sulphate of Baryta. These 

 minerals will be analyzed by Dr. Jackson, who promised to 

 make a future communication on the subject. 



Dr. Moses W. Weld, and Messrs. Theodore Lyman, G. 

 Rowland Shaw, and Thomas Hollis were elected members 

 of the Society. 



Rev. Peter Lesly, of Milton, was elected a Correspond- 

 ing member. 



May 1, 1850. 



ANNUAL MEETING. 



C. T. Jackson, Vice-President, in the Chair. 



Present, twenty-four members. 



The several Curators, on being called upon, read their 

 annual reports as follows. 



The Ornithological department of this Society is in a good 

 condition, free from insects, and improved since the last year by 

 the substitution of many good in the place of bad specimens, by 

 the addition of 179 specimens, and by the almost complete label- 

 ling of the Collection. 



Donations have been received from Mr. Francis Gas3ett, Dr. 



