SECTION III., 1910. [69] Trans. R. 8. C. 
IX.—On the Radium Contents of Specimens from a deep boring at 
Beachville, Ontario. 
By A.S. Eve anp D. McINrosx. 
(Read 28th September 1910.) 
In the investigation of the amount of radium in soils and rocks, 
we have found only a few measurements for a vertical section of the 
earth. 
The following results from a deep boring at Beachville may, there- 
fore, be placed on record. 
The materials were obtained through the courtesy of Mr. W. R. 
Brock, Director of the Canadian Geological Survey, to whom we wish 
to express our thanks. 
Treatment: 15 grams of the specimen ground to pass through a 
100-mesh sieve were mixed with 50 grams sodium potassium carbonate 
and fused. The mass was powdered and leached out with small 
quantities of water until the filtered washing failed to affect litmus 
paper. The mineral was thus divided into two parts, which we have 
designated the “soluble” and the “insoluble,” the former containing 
the sulphate, and the latter the barium and, consequently, the greater 
part of the radium. The two portions were acidified with hydro- 
chloric acid, evaporated to dryness and “baked ’’—this operation being 
several times repeated to render the silica insoluble. The acid solutions 
were filtered and the silica removed with hydrofluoric acid. Any in- 
soluble material remaining was fused again and finally brought into 
solution. 
The amount of radium is expressed in terms of billionths (107?) 
gram of radium per gram of rock. 




Depth | General Character Insoluble Soluble Total 
in. feet | 
30 IcimestOne’ amuse oie 0.73 0.074 0.80 
420 Limestone and Clay....... 0.98 0.074 1.05 
870 SHG [a eee 2 LR ne 0.22 0.28 0.50 
Plr0Om MT imestone.. .ccu «cio sehen < 0.49 0.11 0.60 
1,620 Limestone and Sand. ..... 1.10 0.32 1.42 
2,040 CAVE ne strate es 1.30 0.30 1.60 
2,400 Himestone rer aa OA 0.23 0.94 
2,580 MATES COME! 2... 1. ne 0.99 0.23 122 
ME irs arcatte 0.81 0.20 1.02 



