8 H 



GEOLOGICAL SURVEY OP CANADA. 



no indication even of incipient fusion. The bricks which, at the time 

 of their insertion, were light-' brownish-yellow, had now assumed, exter- 

 nally a purplish-brown, and internally a blackish -brown colour. They 

 were sonorous and exceedingly hard and tough. 



ALUNOGEN. 



Analj'sls o 

 alunogen. 



Collected by Mr. Scott Barlow from an old heap of shale at the 

 " Scotia Mine," Springhill coal-field, Cumberland County, Nova Scotia. 



Analysed by Mr. Frank D. Adams. 



This specimen was in the form of a crust of from five to five and a 

 half centimetres thick. Colour white, in some places light yellow. 

 Taste inky-astringent. Melts in its water of ciystallization and at a 

 higher temperature gives off sulphuric acid. Soluble in water. 



Its analysis gave the following results : 



Sulphuric acid 36.935 



Alumina 13.479 



Ferric oxide 2.888 



Ferrous oxide 157 



Lime .140 



Magnesia , 138 



Potash 087 



Soda 131 



Ammonia (small quantity) Undet. 



Water 45.109 



Insoluble matter .235 



99.299 



NATURAL WATERS. 



WATERS OP THE ASSINIBOINE AND RED RIVERS. 



Waters of the Geological character of the areas drained by these rivers. — The 



Assimbome ° . .... 



and Red following: information in connection with this subiect has, at my 



Rivers. ° J ' . 



request, been kindly furnished me by Dr. G. M. Dawson. 



" The Red River, flowing from south to north, runs probably for its 

 whole length over deposits of late date. These are, either the fine 

 silty materials laid down in the bed of the southward extension of 

 Lake Winnipeg, which previously occupied the valley; or clays and 

 sandy clays due to the glacial period. Long and important streams, 

 however, join the Red River, both from the east and west, and the 

 character of the river water is doubtless due to the nature of the 

 country occupied by the springs and sources of these, rather than to 



