366 Journal of the Asiatic Society of Bengal. [October, 1909.] 
resulting from the transformation of sugar, and that one or 
other was a constant character of some natural orders. Nay- 
lor and Chaplin in 1889 found dulcitol in the bark of Z. atro- 
sap charged with a special sugar which they proceed to deposit 
on the leaves and the bark in an almost pure condition. 
tion. In ecimen of gum of Elaodendron glaucum 
was sent to the Indian Museum by the Conservator of Forests, 
Dehra Dun. Th ll um ”’ was a milk-white substance 
was 
fracture, sweetish to the taste, with an odour of ordinary 
manna. Some hard white crystals were separated from its 
) 
point. Its chemical composition was therefore different to 
that of all the known Indian mannas. In the light of the pres- 
ent investigation the substance was most probably a deposit 
forme by insects of the Phromnia class. 
It is interesting to observe in conclusion that the sub- 
stance known as dulcite (now called dulcitol) was first. obtained 
from a concrete Sugar or manna sent to Paris from Madagascar 
in 1848. The origin of the sample was quite unknown. It 1s 
not improbable that it was a saccharine deposit formed by in- 
sect agency such as that dealt with in this paper. 
PN PRP NLL LOI Na 
