224 SILVER LOCATIONS OF THUNDER BAT. 



in ■width. The gangue is essentially calc spar and quartz, carrying 

 galena, blende, iron pyrites, and copper pyrites, with, native silver and 

 silver glance in the west branch, A considerable amount of ore, 1,336 

 K)s., was sent to Montreal, and there carefully sampled, into four lots, 

 under the direction of Dr. Dawson, Principal of McGill College. No. 

 1 consisted of solid pieces of rich veinstone; whilst Nos. 2, 3, and 4, 

 were sampled from borings, and were thus in the form of powder. 

 Assays made by Dr. Hayes, of Boston, and by Mr. Macfarlane, gave 

 the following results : — 



Dr. Hayes: JSTo. 1. No. 2. 'No. 3. No. 4. 



Percentages 41-1'7 11-26 5-S2 1-18 



Oz. per Ton of 2,240 lbs 15,064 3,6*78 1,901 385 



Mr. Macfarlane : No. 1. No. 2. No. 3. No. 4. 



Percentages 13-14 '7-3 4-94 1-82 



Oz. per Ton of 2,240 as 4,294 2,384 1,613 694 



Before these results were made public, another set of the samples 

 was forwarded by the President of the Montreal Company, for assay, 

 to the writer. The results were given, in tabular form, as follows: 



No. 1. Mean of two assays : 



Q;Wn,. 1.^ .Q« „„.. „ <- 5 =4,886 oz. 18 dwts. 15 grs. in Ton of 2,240 R)s. 

 Silver 14 96 per cent., j _^^3^g ,. ^ ,, ^^-,, ., " 2:000 R)s. 



Averao-e v^lue of silver \ ^^ ^°^ «^ ^'^^^ ^'- °^ ore=$6,547 Vj" 

 Aveia^e value ot silver | ^^ ^^^ ^^ ^,000 R)s. of ore=$5,846UV<' 



No. 2. Mean of two assays : 



«; w^,. f7 . QQ ,.„,. „„ f ^ =2,5V4 oz. 2 dwts. 14 grs. in Ton of 2,240 R)s. 

 Silver T 88 per cent... j_2;298 " 6 " 9 " « " 2,000 fts. 



Averao-e value of silver \ ^^ ^°^ ^^ ^'^^^ R>s. of ore=-$3,449 W" 

 Aveia^e value ol sUvei j ^^ ^^^ ^^ ^,000 lbs. 6f ore=$3,079 W 



No. 3. Mean of two assays : 



a;i™,. K.o^ .„ <- (=1,72102. 10 dwts. 14 grs. in Ton of 2,240 R)s. 



Silvers 27 per cent... j^j'gg^., ^ ,, j^»,. „ " 2,000 fts. 



Avera-e value of silver -I ^"^ ^°^ "^ ^,240 R)s. of ore=$2,306 '^/ 

 Jiveia^e value or siivei -^ ^^ rj.^^ ^^ ^,000 as. of ore=$2,059i8'V 



No. 4. Mean of three assays : 



q;w<... 1./71 , „ 4. ( =558 oz. 12 dwts. in Ton of 2,240 K)s. 

 Silver 1 71 per cent... I _^gg ,, j5 " " " 21000 fts. 



Averao-e value of silver -f ^'^ '^^^ °^ ^'^^^ *'• ""^ ore=$748 '// 

 Aveia^e value ot silvei -^ ^^ ^^^ ^^ ^,000 lbs. of ore=$C-" ' " " 



The per centage values found in the three sets of assays, were, thus, 

 as follows : 



No. 1. No. 2. No. 3. No. 4. 



Dr. Hayes 41-17 11-26 5-82 1-18 



Mr. Macfarlane ...13-14 7-30 4-94 1-82 



E.J.Chapman 14-96 V'SS 5-27 1-71 



