1919.] The Sixth Indian Science Congress. xcix 
is not such a simple process as the aoe eagerness Pen sugars into 
sucrose, and that the caer explanation seems more reaso 
The necessity for further investigation into the rode of formation of 
cane sugar in the Sra is indicated. 
The effects of va ft on the growth and composition of 
sugar-cane varieties —By R. KrisHNaMuRTI Rao. 
During 1913 in a portion “ Block II (Field Nos. 12, 13 and 3) of the 
newly-acquired Cane- ing Station, Coimbatore, many thick and thin 
cane varieties and some Madras seedlings si for the first time planted. 
Most of the thick cane varieties died and a few aa came up were very 
, th : 
s expected. Madras seedlin 
causes for ‘this tear ueian result of canegrowth, field No. 3 as rep 
senting Block II was chosen, and on it year after year some cane varieties 
owth is better an 
varieties that were doing well in Block IT es er 
A comparison of t of 
the well waters of rant grit two blocks soned that Block I rane ae 
much less chlorine and sub-soil Be ee than Block Il; the well 
water of Block I pie Poo Dey 33 parts of sodium chloride in 1 
of water, whereas the well wetect of ren II (well No. 3) con- 
h as 189 pa a excess 0 
sodium chloride in the _ ation rotate in the composition 
of cane juices obtained ek Block Tr (field No. 3) which showed a large 
excess of ee and potash. 
As e s of chlorine was found to be yen: atte by e 
Lope stonigh not in any definite sess etermination ste obthe 
considered sufficient to get an idea of the. quantity of the other. 
The e determination of potash is not easy and takes much ee: and so 
i in re) 
so g 
lime water and alumina cream, ich gives satisfactory results, was 
When the nature of varieties that have from os year a till now 
come up well and of those that have not done well in ock II is analysed, 
P average 
— d, whereas in Block [ it = only 0°15. It was also found that 
i i lo - — — the same conditions, 
‘to this the jaggeries made at the Cane 
Indian thin jane do not oes well and have a tendency to run to liquid 
when kept lo 
Hav en cans excess of chlorine in cane juices to be the chief cai 
for the ntre growth of canés, for low sucrose, glucose and purity ¢ pomeerered 
