248 uccuiii;i-:\cK ov tin in nova scotia.- imkhs. 



€vi(lentlv ;i)t pay to niino the whole width of the pegmatite 

 material ( 1:3 feet) heeaiise of its paucity of tin. 



This proper method of eoneentration of this tin ore is direct 

 iiraded crushing and concentration on a fine sand concentrator 

 sucli as a jerking table like the Wilfley pattern." 



Co?} elusions. — Professor Sexton's test indicates that the 

 whole width of the dike, at that depth, is low in tin contents, 

 and an effort should ho made to discover if the cassiterite is 

 segregated in any one part of the dike, as is quite likely, in 

 which case the percentage would he increased in the portion of 

 the dike that might be mined. ^Numerous pieces of ore, 

 about the size of a hazel-nut, have been obtained and are 

 in the Provincial Museum, but it is not known from 

 what part of the deposit they were taken. The presence 

 of an ore-shoot should be ascertained if possible. It must 

 be rememhered that some of the as&ociated minerals are 

 valuable for A-arious purposes, and bring excellent prices in the 

 market, and if some of them are proved to be in sufficient quan- 

 tity might be even more profitable than the tin, or at any rate 

 might be worked conjointly with that ore, and so make a profit- 

 able proposition. So far these associated minerals do not seem 

 to have attracted the attention of the owners, although they 

 much merit consideration. 



I would suggest that tbe gravels and sands of the low-lying 

 districts about New Ross and other favorable localities on or 

 adjoining the granitic areas of Nova Scotia be carefully exam- 

 ined for the occurrence of stream tin, as such alluvial deposits 

 might be found to be more valuable than those in situ. Peg- 

 matite dikes in granite and in the adjacent sedimentary metro- 

 moi-phis rocks of the gold-measures, i)articularly such dikes as 

 contain boron and fluorine minerals, such as tourmaline, 

 fluorite, etc., and also lithium-bearing minerals, should be 



* Sexton (F. H.) Ueporl (ui concentration tost (mi tin ore from New Itoss. 4tli Sept., 

 1907. Manuscript. 



