OBSERVATIONS ON SUPPOSED GLACIAL DRIFT. 



253 



and the centre is given by 



a cos ^ = /3 cos 5 = 7 cos C, 

 that is, it is the intersection of the perpendiculars from the angles on 

 the sides of the triangle. 



If the conic be an equilateral hyperbola, then 

 u + V -^ w ■= 0, 

 and the coordinates of the centre satisfy the condition 



- + | + ^ = 0| 



a ^ y 



that is, the locus of the centre is the circumscribing circle of the 

 triangle. 



Univ. Coll. . J. B. C. 



June, 1864. 



OBSEKYATIONS ON SUPPOSED QLACIAL DEIFT IN 

 THE LABEADOR PENINSULA, WESTERN CANADA, 

 AND ON THE SOUTH BRANCH OE THE SASKAT- 

 CHEWAN. 



BY HENRY YOTJLE HIND, ESQ., M.A., F.E.G.S., 



PEOFESSOK 05 GEOLOGY IN TEIHITX COLLEGE, TOEONTO. 



{From the Proceedings of the London Geological Society.) 



CONTENTS. 



1. The Boulders on the flanks of the 

 Table-land of the Labrador Penin- 

 sula. 



2.'The [forced Arrangement of Blocks 

 of Limestone, &c., in the Blue 

 Clay at Toronto, and on the South 

 Branch of the Saskatchewan.. 



3. The Driftless Area in Wisconsin, 



4. Beaches and Terraces. 



5- Anchoi'-ice — Excavation of Lake- 

 basins. 



6. Parallelism of Escarpments in 

 America. 



V. Conclusion. 



§ 1. The Boulders on the flanks of the Table-land of the Labrador 

 Peninsula. 



During an espl oration of apart of the interior of the Labrador 

 Peninsula in 1861, I had an .opportunity of observing the extraordi- 

 nary number, magnitude, and distribution of the erratics in the valley 

 of the Moisie River and some of its tributaries, as far north aa the 



