exxxiv Journal of the Asiatic Society of Bengal. [N.S., XIV, 
lowering of solvent power in certain cases is open to objection, as the 
curves are found to run parallel with those pat iecs to be normal, 
whereas increasing divergence should ee Rieger ai with rising concentra- 
tion as is observed in the case of anilin 
The conductivities, viscosities and densities of saturated 
and supersaturated solutions of sodium nitrate and their 
variation with the temperature.—By B. H. WILspoy, 
MvuzaFrrar-UD-Din and 8. Att KHAN. 
1; asurements are oy ti of the density, viscosity and conduc- 
tivity of solations of sodium ni 
2. It is shown vor t the pity obtained ese plotting the “* intrinsic 
condustivays# 4.€ pro of the ve viscosity and the 
molecular sondutteitey hanicat: art encod exhibit well marked 
minima 
‘No considerable change is observable in the temperature co 
efficient of seitvitnis Hecsgraalal at these concentrations (approximately 
oar per cent Na 
It is pointed ont that since ‘* ec appee o pit as exhibiea 
by a salts has generally a maller temperature coefficient 
than ordinary or ‘‘ vcore orb Rearend the hypothosls put forward 
bed —— ies Lowry in which the increase of co epee ity shown by 
sipitesd Bie Waees, and oth 
The Oleo-Resins from Hardwickia Pinnata and Dipter 
carpus Indicus.—By J. J. SupBoroven, K. SrtaRay 
Iyer and J. C. MANSUKHANI. 
_ Bot th oleo-resins when gage in pie yield an essential oil and 
resin. The essential oil in each ¢ sional of sesquiterpenes togeth x 
with a small amount of an iano: Pie siting 
ief hydrocarbon constituent o bath essential oils a appears t 
be « Caryophyllene, identica with that obtained ake oil of sor 
pea i ta ae and ca e could not tected. The 
ppea 9@ a good substitute for Co oil. 
The resins differ in properties, that from the Hardwickia has ee 
oe point oes not coagulate when heated, whereas that frou 
ocarpus coagulates and in this respect resembles the resin 
: ordin 
oil from Gurjun balsam (mainly derived from D. turbinatus 
OCS : $ 
vis) does not contain Sirvontelehe. but'two isomeric hydrocarbom 
a and oa -Gurju 
oil varnishes oy ahd 
both types of oleo-resi ave been prepared fromthe s 
Note . the by hydrolysis mk sere Indian oils by castor 
Lat 
lipase —By K. G. 
ition ee 
A series of experiments has been ere a the rate of fess : 
a 
of cotton = gro posi ut, castor and h oils by ™ ° 
fal d ferm ss tlie sual way. The haiiiha “indicate that all oe re sl 
airly realy ‘livdvel gud at the ordinary temperature using 
resins from 
TaD 
