648 



ME. G. ATTWOOD ON AUKIFEKOTJS TEACTS OF 



crystals, also pyrite, specific gravity 2-83, and was found to contain 

 silica, 60*71 per cent. 



Fig. 13. — SJcetclies of a Halagay or' Gold-iv ashing dish u^ed hy 

 Julgars {Gold-washers) in the Shimoga District, Mysore Province. 

 (Scale i nat. size.) 



a. From the side ; b, from above. 



Pig. 14. — Sketches of Dhone or Sluice-box used hy Gold-washers in 

 the Shimoga District. (Scale -^ nat. size.) 



a. From the side ; h, from above ; c, end view. 



Another porphyritic dyke (see Kock-section no. 6, p. Qb2) showed 

 considerable signs of weathering ; the colour was a light pink, the 

 strike nearly north and south. The specific gravity was found to be 

 2*83, the same as that of its harder-looking brother. A specimen 

 taken from another porphyrite, having a strike nearly east and west, 

 was found to have a specific gravity of 2*84, and to have a dark-grey 

 base, with the felspar-crystals chiefly pink and glassy. 



Another porphyrite (see Rock-section no. 9) had a dark-grey 

 colour, and was very compact and difficult to break, resembling in a 

 great measure Eoek-section no. 8. 



