224 The Ottawa Naturalist. [March 



Gushing, Henry P — " Syenite-porphyry Dikes in the Adirondack 



Region ^^ 



Recent work in Clinton county N.Y., has shown the existence of dikes belong- 

 ing to the syenite-trachyte family of eruptive rocks, which are of different age from the 

 bostonites described by Kemp and Marsters from the near vicinity. They are older 

 than the I'otsdam sandstone as they have furnished pebbles to its basal conglomerate. 

 On the other hand the older rocks of the region were metamorphosed before their 

 extrusion. Together wiih the associated diaba>es they show great resemblance to the 

 Keweenawan eruptives of the Lake Superior region. They possess considerable 

 petrographical interest. 



Adams, Dp. F. D. — " Nodular Granite from Fine Lake, Ontario. 



The paper describes a granite from a recently surveyed portion of the Province 

 of Ontario, which in places contains an abundance of nodules scattered through it. 

 These nodules differ in a marked manner from those occurring in any of the hitherto 

 described nodular granites, among other things in being more acid in composition 

 than the rock itself. They are frequently found to be arranged in long lines which, 

 when followed up, coalesce into sheets having all the characters which are commonly 

 presented by secondary quartzose veins. The phenomenon evidently results from a 

 process of differentiation in the original magma and has an intimate bearing on the 

 question of " contemporaneous veins." 



Adams, F. I), and Nicholson, J. T. — "Experiments on the ^ow of rocks 



noiv beir.g made at McGill University.^'' 



This valuable paper on experimental geology was very well received 

 and threw not inconsiderable light upon the behaviour of rock material 

 under great pressures. Numerous experiments made upon the com- 

 pressibility of marble and the form assumed by a cylinder of marble 

 after being submitted to great pressure were carefully described and 

 illustrated. The bearing of the results obtained even at these early 

 stages of the investigation on the nature of the action of rock masses on 

 a large scale in nature — on earth movements in general — were also 

 pointed out. 

 Coleman, A. P. — " Clastic Uuroninn Rocks of Western Ontario, and 



the relation of Huronian to Laurentian." 



The Presidential Address by Prof. Orton was on the subject : 

 " Geological probabilities as to Petroleum." 



Notes. — Tlie Sessions were held in the Lecture Room of the 

 Peter Redpath Museum of McGill Univtrsity. 



On the evening of Wednesday, Dec. 29th, a private reception was 

 tendered to the Fellows of the Society by Mrs. Porter and Mrs. Adams, 

 in the new Macdonald Mining' Laboratories of McGill University. 



The thanks of the Society were tendered to the Governors of 

 McGill University, and to Profs. Adams and Porter for their kindness and 

 attention during the meetings. 



Dr. Adams, Dr. Ells and the writer having been requested by 

 Secretary Fairchild to give notes on the geology of Montreal, Dr. Adams 

 led in an interesting talk, which was followed with much interest by all 

 present. — H.M.A. 



