66 1.8.C. Proceedings of the Ninth [N.S., XVIII, 
2. The chief cause of the bad smell is the presence of the ally] radi- 
eal (unsaturated and hence hydrogenation may remove the bad 
odou r). 
3. The soe cause of the bitterness of the oil is due to the aires 
wre alkaloids—probably quinine and cinchonine or some 
The exact alkaloids —_ not be definitely settled. 
4. The rok a can eg Habearg: for commercial purposes, by at 
t through animal charcoal (prev cake heated to ied hot tem 
pekitare! and follo wed by vi vigorous treatment with K,Cr,07 ssid 
H,SOy, in the ratio of 0- 750) 1 15 sae 
Hydrogenation of oils.— By J. W. Paut. 
——o ser used was reduced nickel. ade obtained from its oxalate 
accessful catalyst, — obtained from calcined nitrate was 
betiec. ar ‘th 1e best Sd Lig as abeete ae oe » nickel carbonate, rey! 
heating it for about half cu ¢ of pure hy ii ta 
pepe Sag Ecnsias 215- 18°C. po ‘Coa "ston 8 Sauk 
The glass of which the tube, for the reduction of the nil salt, is 
made seems to be largely responsible for the activity of the catalys 
a should be hydrogenated in vessels in which the oalatyie has been 
prepared 
Barra oil was solidified to a jelly-like, light pale-green, transparent 
substance. Til and Mahua oils were also solidified. 
The reaction between sodium suleniie and sulphur.—By 
H. E. Watson and M. RasJAcoPata 
The aeprepecind > e reaction between oo sulphite and ey 
in presence of w e been studied. Most of the determinations were 
made at 60° seg 30° : which hansccnicses the rate can be someone 
measured. 
In moderately dilute ret tg Smog meta is alien rapidly: in very 
concentr wea solutions the what less, but in all peg ~ rate 
of reaction is very gre atte § incre aed by the alien we lar of 
sulphur, and = auger? seis sonait ions the conversion to "fhiosulphate 
is complete in less than 
Other factors noe as io rate of stirring and the effect of catalysts 
have been stud 
ncaa se of some reactions.—By R. ©: 
Ban 
The kinetics and temperature-coefficients of the following reactions, 
which are sensitive to light, have been studied in the dark :— 
(1) ag uit nd iodic ean rey coefficients were fund 
eunbuctceity measurements. The reaction was fo cor o 
be sagen sie Se the temperature-coefficient be eing 3°27 be = 
29°C and 59°C ; and 2-96 between 59°C and 69°C ; and Acie 
. ‘ K) _A (T\—Ta) was 
A cale. according to the equation log oa +s 
found to be 5213. 
2) J chase werk: +COd. dito 
} as followed by venermesiisn with alkali, and se me id 
ae emia ae ving a temperature-coefficient of 4°3 betw Cc we 
90°C, a: =a "tones? A=8117. HCl ee H,SO, gradually ae t 
total acidity of the solution, 

