NORTHERN SUGAR INDUSTRY. 



105 



ber of times that weight used. (In some instraments other weights are 

 normal, e. g., 26.048 gms. With each instrument will be found instruc- 

 tions giving the weight of sugar to which the scale is graduated.) 



A good deal of practice is necessary to use the polariscope accurately 

 and quickly, but I do not see why any person endowed with ordinary 

 ingenuity may not determine the percentage of sucrose in cane juices 

 with a reasonable degree of accuracy by means of the polariscope. 



More accurate analyses, as well as analyses of sirup and meladas, 

 must be left in the hands of the chemist. 



The flasks, burettes, funnels, &c., necessary to the analyses of cane 

 juices (excluding the polariscope), ought not to cost more than $10. 



The intending purchaser should get: 3 pipettes 5, 10, and 15 c. c. 

 capacity ; 6 sugar flasks, marked on neck at 100, and 110 c. c. ; 2 bu- 

 rettes; 6 funnels 5 2 quires filter paper ; 2 hydrometers. The other 

 apparatus he can easily improvise. 



This apparatus can be had of any dealer in chemical supplies. 



The high price of the ordinary polariscope, the delicacy of its adjust- 

 ment, and the skill required in its use, have made it desirable that 



TEANNIN'S POLARISCOPE. 



Fig. 13. — Traunin's polariscope. 



