226 



consequently, when one is found in a certain rock, another may 

 be looked for with a considerable degree of certainty in the 

 same rock. A knowledge of the laws of association of min- 

 erals is very useful to young mineralogists, and may be studied 

 in the cabinet, as well as the peculiar appearances of minerals 

 from different localities. 



Dr. Jackson also gave a brief account of the fossilized 

 skeleton of a large Cetacean, recently brought to this city 

 from Maine, by Dr. Hamblin. 



It being thought advisable to provide for the better care 

 of the mineralogical collection, temporarily, during the 

 pressing business engagements of the Curator, on motion 

 of Dr. Durkee, it was voted, that some member of the 

 Society, in the absence of the Curator, for the present 

 season, be requested to take charge of the mineralogical 

 collection. By vote, Mr. Francis H. Storer was requested 

 to perform this duty. 



Mr. Sprague exhibited a beautiful collection of Fungi 

 growing upon plants, collected by him during this summer. 



Mr. Sprague, from the Committee on alterations in the 

 Library room, reported, that the proposed changes had 

 been made, and were a great improvement to the room. 

 The expense was $107.84. 



August 15, 1855. 



Dr. Charles T. Jackson, Vice-President, in the Chair. 



The following communication, from Rev. Francis Ma- 

 son, Corresponding Member, was read by the Secretary, 

 to whom it was addressed : — 



" My Dear Sir, — I will thank you to present to the Society, 

 in my name, the accompanying Laterite Irick, from the valley 

 of theSitang, in Burmah. 



