Se Se A ee er 
Se EO tee oa mem biewer 
Re Te EE ee Re Le gfe ery er ee Oe 
1918. ] The Fifth Indian Science Congress. ci 
cal (Shorea sheets) ppd Where as water cult bike a shown that 
water in itself is quite hiedicee: yet water which is held in sontees wit 
: : : ; h phn 
; ic creases 
soil, such as shade or bad drainage, accentuates the injurious action. 
Rain-water held in contact with such i: is found to become heavily 
harged wi 
¢ with carbon dioxide aid: impoverished as regards its oxygen 
supply. In water culture experiments, a high carbon dioxide and low 
oxygen-content have been proved to be injurious to the roots. There are 
for believing that, in additi sal, many of our most 
dian s very sensitive to soil-aeration, wrt a — ] 
only on account of its effect on the establishment and dev x san of 
seedlings but also because of its probable influence on the growth of older 
trees and its possible connection vith i injurious diseases. 
Indian Essential Oils—By Dr. J. J. Supporoven, F./.C. 
Dr. J. J. Sudborough opened a discussion on Indian Essential Oils. 
Attention was drawn to the fact that many of the essential oils quoted 
* Indi he 
e 
Some of the more important of these oils are: Ripraror ee rap eae 
mon 8 
e only oils which have been distilled for years in India the 
four grass oils, and essential ol - xperts claim — ped bulk of thao oils 
gla i i 
adu lte dition W: 
as late as May 1917 that posing o pure iteomella ‘oil is is shipped from 
Ceylon, it is almost invariably adulterated with petroleum; Java 
citronella oil, on the other hand, is nearly always pure 
Indi present war has resulted in the creation of several distilleries in 
ndia for the manufacture of sandal oil from sandalwood and of thymol 
re . facto “sa are run on scientific lines, turn ou 
tnadulterated products and dur ing war time are yielding, big profits. It 
‘hoped that in post-war retina India will be able to supply veadl world’s 
ands for sandalwood and thymol and that the exportati t 
ite aa for the distillation 4 these into products in other set 
Iti as 8 possible that 7 npn: - Landes — Ripe gga oils ae 
financial success, oud atte re 
ani 
veti ee sow wou e keen. The mam 
th vert and East — dill oils is worth further consideration whereas 
Xd “opremnpge of coriander or anise oil from Indian seed is hopeless at the 
ian 
(ney Eucal itri ntalis 
ioui, yptus, Citriadora Macarthuri, Liquidanter orie 
(Liquid Storax), Piper scbeba “(oil of Cabebs). The production of new 
