70 PROCEEDINGS OF THE CANADIAN INSTITUTE. 



aware of any having been found in gneissoid rocks, but trilo- 

 bites had been found in mica-schist. 



Dr. Ellis made some remarks on the occurrence of beds of 

 iron ore with limestone, and wished to know whether geolo- 

 gists had formed any theory as to the origin of ferruginous 

 deposits. 



Mr. Dale stated, that some ferruginous deposits might be 

 direct products of erosion, as in the case of the magnetite 

 which frequently occurs in beach sand in the vicinity of crys- 

 talline rocks, but that they were probably more often of a 

 largely chemical origin. Geologists usually concerned them- 

 selves more about the chemical questions involved in the 

 formation and alteration of ferruginous deposits than with 

 the physical ones. 



In answer to a question from Mr. Boyle, Mr. Dale said he 

 had not found any specimens of crinoids over two inches in 

 length ; the greater number of the specimens were much less. 

 As to the species, it was generally considered that they were 

 Upper Silurian. 



Mr. Livingston called attention to the remarkable boulder 

 riear Mount Washington. 



Mr. Dale said that the size and shape of the boulders 

 would naturally be determined by the joints of the rock from 

 which they originated. He illustrated how the rock would 

 be broken into blocks by an experiment with a box of clay 

 subjected to hydraulic pressure. 



The President read the Report of the Committee appointed 

 to revise the Rules and Regulations of the Institute, and gave 

 notice that at a special general meeting to be held on 23rd 

 January, 1886, he would move that the Rules and Regula- 

 tions be amended in accordance with the Report of the Com- 

 mittee. 



