284 BROWN & HERON: GBOLOOT AND OKB DEPOSITS OF TAVOY. 



In L911 a mill was erected. It has been enlarged and altered 

 from the original design and since an air compressor and machine 

 drills were introduced has run continuously. It consists of a rock 

 breaker, three pairs of rolls (22, 18 and 8 inches), three jigs two 

 rotating screens and two Wilfley tables. It is driven by a 40 II. P. 

 Campbell oil engine. 



The compressor is an Ingersoll Duplex machine of 300 cubic 

 feet per minute capacity, driven by a 55 H. P. Fetter s eemi-Diesel 



oil engine. 



Another machine installation consists of two high speed Bellis 

 and Moroom steam engines of 50 11. P. each (supplied from two 

 water tube boilers by Thompson of Castlemaine) direct coupled 

 to a 10 inch centrifugal pump. These are used in the treatment 

 of the high level detrital deposits of the slopes on both sides of the 

 valley It is interesting to note that there is a vertical difference 

 of height of 400 feet between the lowest and highest underground 

 workings on the "A" system. 



In 1918 a concentrating pan similar to the type used at the 

 Buvma Ruby Mines and the Kimberley diamond held was erected. 

 The nan is 10 feet in diameter and has attached to it a grizzly, a 

 rotary screen and picking tables. It is driven by a 20 H. P. Hornsby 

 \kmvd-oil engine which also propels a 3-inch centrifugal pump 

 which supplies water in sufficient quantity to meet the requirements 

 () f the whole plant. The pan has a capacity of 100 cubic yards 

 a day and it is claimed that it saves a larger proportion of one 

 concentrates and does the same work with about a third of the 

 amount of water required by an average sluice box. 



Further down the vallev there is an alluvial flat containing a 

 bed 'of cassiterite-bearing gravel. A plant has recently been erected 

 to deal with this. The ground is opened up m a paddock and 

 the pay dirt raised in trams to sluice boxes. Two rotary screens and 

 a haulage winch complete the machinery, the whole being driven 

 by a 22 H. P. Hornsby oil engine. 



The following assays may be taken as typical of Pagaye con- 

 centrates : — 



IV r cent. Per cent. 



„ ., , * 80 wolfram. IS <a.«siferite. 



Detrital concentrate ou 



... ... 86 „ 10 



Vein ,, • • ' „ n 



Alluvial ,. • 



