64 APPEITDTX, 



Dezrels =: 1 grain (0*892 grains troy). 



Yintem ziz 2 grains. 



Oitaya z= 64 grains (72 grains Portuguese). 



„ n= 17"44 carats. 



„ r= 32 vintems. 



„ r= 16 carats. 



" The Hindu equivalent of tlae carat is tlie rati (ruttee), whicli 

 Tavernier makes := -§■ carat zz: 3|^ grains. 



I may add to the above that Dr. Kelly, in " The Universal 

 Cambist" (vol. 1, p. 220) gives the carat = 3"i grains troy, or 

 205x French decigrammes. This is less than Burton's value 

 by 003-1. 



" Pearls are weighed by tlie troy standard, but the pennyweight 

 is divided into 30 grains instead of 24, and therefore an ounce 

 contains 600 pearl grains ; hence 4 troy grains ^z 5 pearl grains. 



" Grold and silver are weighed by the troy standard. 



In valuing quartz by the ton avoirdupois, and gold by the ounce 

 troy, mistakes may occur. It should be remembered that a pound 

 of the former is equal to 7,000 grains troy, and an ounce of the 

 latter to 480. 



C. 



ExTEACTS from Eeports and Evidence by Eev. "W. B. Clarke, in 

 reference to the discovery of Tin in New South Wales. 



1. Extract from an article on Mlninff, in Sydney Morning Herald of 

 16th August, 1849 :— 



" Here, for the sake of usefulness, we suggest that, though tin 

 has not yet been found in this Colony, it may hereafter be dis- 

 covered. It is not imj)robable that it will be found along parts 

 of the Murrumbidgee, where granite occurs with abundance of 

 schorl ; since, in granitic districts of Cornwall, oxide of tin bears 

 a marked connection vnth scliorl, which latter mineral is a principal 

 ingredient in tin lodes. The writer of this suspects, however, 

 that he has found crystals of tin in granite from the locality 

 mentioned, though he did not pay particular attention to the fact. 

 The abundance of copper in this Colony would naturally suggest 

 the probable occurrence of tin, though it is equally probable that 

 the abundance of our copper is mainly due not to the existence 

 of true granites, but to the occurrence of the trap rocks of the 

 more usual varieties. " 



