250 



Canadian Record of Science. 



The close correspondence between Mr. Carlyle's analysis 

 and that of the writer would seem to indicate that this 

 Lac la Tortue ore is of fairly uniform composition over a 

 considerable area. 



The Radnor furnace charge consists of 840 lbs. of the 

 mixed ore, 84 lbs. of limestone and 32 bushels of charcoal ; 

 the blast used has a pressure of three-fourths of a pound, 

 and ranges in temperature from 300° F. to .450° F. The 

 yield of iron is on an average 42-43 per cent, of the weight 

 of ore used. 



The iron sent for analysis consisted of sections of two pigs 

 of different degrees of hardness and produced at different 

 times. Nos. I. and II. are the Radnor irons, No. III. is Dr. T. 

 Sterry Hunt's analysis of a specimen of gray pig made at 

 St. Maurice in 1868. l 



Composition of Pig Ieon. 



Iron 



Carbon .... 

 Graphite . . . 



Silicon 



Sulphur 



Phosphorus 

 Manganese . 



90.707 



II. 



94.375 



96.302 



Undet'd. 



.378 



.336 



1.100 



1.904 



1.796 



2.820 



1.379 



.485 



.860 



.062 



.049 



■025 



.464 



.430 



.450 



1.145 



.895 



1.240 



100.293 



III. 



Canadian Argol. 



By J. T. Donald. 



Argol, as is well known, is the commercial name for the 

 crude cream of tartar, which, owing to the diminished 

 solubility of the tartrates, in alcohol is deposited on the ves- 

 sels in which grape juice is fermented. The principal pro- 

 ducers of this material are, of course, the grape-growing 



1 Report Geol. Survey, 1873-74. 



