1918.] The Fifth Indian Science Congress. elxvii 
mine the precise factor concerned and the way in which it acts. 
He would probably find for instance that the beneficial result 
of removing the cover in this case consists not in increasing the 
light available for photosynthesis in the green leaves . the 
ing, but in improving the conditions of soil-aeration. 
This knowledge might explain pi sraieil contradictory panier 
such as that a similar removal of cover does not have the same 
results of the greatest economic value very quickly, but at the 
same time it is perfectly clear that for continued and satis- 
factory Seen in sylviculture a more precise and intensive 
knowledge of the various factors and the way in which they 
affect the plant is essential. The work of the oecological 
botanist, therefore, is the necessary complement to that of the 
sylvicultw 
12 
economic importance in connection with the management of 
our forests and grasslands and the control of plant diseases. 
The sun-drying of es Naeehae He army purposes.—By A. 
Howarp and G. L. C. How 
One of the difficulties in the maintenance of military expedit ions 
in sparely esha arid tracts like the North-Wes uae of in 
PO0 eer f Mesopotamia, is the supply of fresh ‘vegetables. As is we 
a? t ies bstances are necessary to prevent loss ; 
Tough scurvy and other diseases. What is sequived is asystem of peng to 
ss . 5 
re in the di Matin t here 
ete the dry a here er the upland “valle ~~ es "Ba uchistan w 
ine b bles can ‘be otosphor dried in he an sun e product is then pressed 
> e . * 
has been ly of vegetables 
und possible to compress the weekly supply of vege 
28 Saag by a battalion into tw es tins which can be carried by ve 
Shtans ous processes are described and illustrated by means 
Plies of cit natin obtained. 
Note on peu iiss so, A. Howarp «ad 
L. C. Howa 
Tw. 
. Instances of t in the case of the ban. “ 
pal are described “ps sani ot gating method of = museum 
Pecimens. Sp steal. ne natural root-grafts were exhibi 
