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g SS fool. B& go} rs g-|. 88 
1 3.0 17 56-0 33 115-0 49) 1991 
2 6-1 18 59-6 34 118-8 50 181-1 
3 9.2 19 63-2 35 122-5 Al 185-2 
4 12-3 20 66-9 36 126-3 52 189-5 
5 15-5 21 10-4. 37 130-0 53 193-5 
6 18-8 99 ln 74-41 39} 133-68 54. 197-6 
71 22-0 | 28 "7.9 39 137-6 55 | _ 201-8 
8 | 25-2 24 81-4 40 141-5 56 206-0 
9 28-5 25 85-0 4] 14504.) BP 21048 
NOs 81-8) 26 88.9 42 149-3 58 | 214-6 
fisite 230-1 on 92-5 43 153-2 59 219-0 
12 38-5 28 96-3 44 157-2 60 | 223-5 
1) 42. | 29 100-0 45 Lode baleerver 927.9 
Tl 454 |). 30 103-8 46 165-0 62 | 232-2 
15 48.9 31 107-5 4Y 169-0 63 236.6 
16 52-4| 32 111-2} 48 173-0 64°} 241-0 

The examination of a solution containing an unknown amount of 
sugar is conducted in precisely the same way as the standardizing of 
. the permanganate, 10 c. c. of the sugar solution, and 50 c. c. of “the 
PE ae re ns We PL Se PT ee 
* a . <a Ea 2 <j 
aN 
rod 
eines 
Fehling solution being taken in each case. The sugar solution may 
contain as much as two per cent of sugar but should not contain much 
more, as in that case the 50 c. c. of Fehling solution may not be suf- 
ficient. At the end of the re-action, the liquid should be distinctly 
blue from unreduced copper. 
In the examination of cane and other juices, 22 c. c. of the juice 
prepared for the polariscope test, equivalent to 20 c. c. of the original 
juice, were diluted to 50 ¢. c. and 10 c. c., equal to 4c. c. of the orig- 
inal juice, titrated for glucose. If the juice should be very rich in 
glucose it might be necessary to dilute the solution to 100 c. c. instead 
of 50 c. c. 
__ For the estimation of cane sugar in cane, 11 c. c. of the clarified 
juice equal to 10 c.c. of the original juice were diluted with about. 50 
c. c. of water, inverted with concentrated hydrochloric acid, neutralized 
with sodium carbonate and made up to100c.c. Tene. c. equal to 1 
c. c. of juice are titrated for total sugar. The glucose, found snb- 
_ tracted from the total sugar, gives the cane sugar. 
The method is rapid and gives very satisfactory results as the follow- 
ing duplicate analyses of six samples of cane juice for glucose show : 
