82 



SCIENCE. 



[N. S. Vol. VII. No. 160. 



was tendered tlie Fellows by Mrs. J. B. 

 Porter and Mrs. F. D. Adams in tbe new 

 McDonald mining laboratories of the Uni- 

 versity. Many of the faculty families and 

 their friends in the city gathered to welcome 

 the Fellows and a most enjoyable evening 

 was passed. Everything that cordial hos- 

 pitality could suggest wa^ done for the vis- 

 itors. The spacious laboratories and their 

 elaborate equipment with machinery of 

 actual working size excited everyone's ad- 

 miration and should assist in an important 

 way in developing the University and the 

 Dominion. 



On reassembling Thursday morning, at 10 

 a. m., the reading of papers was resumed. 



Nodular Granite from Pine Lake, Ontario. 



Frank D. Adams, Montreal, Canada. 



The paper described a granite from a re- 

 cently surveyed portion of the Province of 

 Ontario which in places contains an abun- 

 dance of nodules scattered through it. 

 These nodules differ in a marked manner 

 from any of those occurring in 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 hav- 

 ing all the characters which are commonly 

 presented by secondary quartzose veins. 

 The phenomenon evidently results from a 

 process of diiferentiation in the original 

 magma and has an intimate bearing on the 

 question of the origin of ' Contemporaneous 

 Veins.' 



Chemical Composition of the Granite from Pine 

 Lake, Ontario. Nevil N. Evans, Mon- 

 treal, Canada. 

 The analyses as given below proved that 



the cores of the nodules were more acid 



than the rims, a relation the reverse of that 



met elsewhere. 

 J. P. Iddings compared these nodules 



with spherulites in obsidian, and Whitman 



Cross brought out the lack of correpond- 

 ence between them and the spherulitic phe- 

 nomena with which he had become familiar. 

 J. F. Kemp emphasized the contrasts with 

 Craftsbury, Vt., ' prune ' granite and the 

 orbicular granite at Quonochontogue, E. I. 



Nodule. Normal 

 Granite. 



Loss 0.92 0.32 



SiO, 81.43 78.83 



AlA 13.70 • 10.88 



Fe^Oj 1.58 1.63 



CaO 0.37 0.22 



MgO 0.06 0.35 



KoO 1.28 5.31 



Na^O 1.02 2.13 



100.36 99.67 . 



Experiments on the Flow of Rocks now being 



made at McGill University. Feank D. 



Adams and John T. Nicholson, Montreal, 



Canada. 



The paper was presented by Dr. Adams 

 and was illustrated by the lantern, by speci- 

 mens of the results attained, and by a sub- 

 sequent visit to the shops to see the 

 machine. The authors have constructed 

 a special crushing machine, much like the 

 usual testing apparatus of engineering labo- 

 ratories. Their object has been to subject 

 cylinders of various rocks to pressures far 

 above their crushing resistance, yet to con- 

 fine them so that they could not shatter. 

 After many unsuccessful trials of materials, 

 strips of soft Swedish sheet iron were wrapped 

 around a core of mild steel and welded to- 

 gether. The core was then bored out, the 

 hole carefully polished and given a taper of 

 one in a thousand. These cylinders were 

 about 3^4 inches high and were turned 

 down in the outer middle part so as to local- 

 ize any bulging under pressure to this 

 portion. They, therefore, looked like large 

 spools, with thick ends. Cylinders of 

 Carrara marble had meantime been pre- 

 pared in Germany of the same taper 

 as the holes and of such a size that, 

 when the spools were heated and expanded, 



