exxxiv Proceedings of the Asiatic Society of Bengal. [N.S., XV, 
of this — Fol arg No other alkaloid is known to me that gives 
similar reaction 
The 0 aetna ~ Pees sesame (til) oil—By H. Rat and 
B. Duy 
“Tad: fas is used aetoc in the SS ON of soap, Indian perfumes 
and margarine and also as an edible 
The objects of the experiments Sauuieeioa were (1) to decolorise, (2) 
to deodorise and (3) to harden the oil by methods capable commer 
apyay oO 
Li on the subject, beyond hydrogenisation, gives no special 
method ris bleaching the oil. 
The oil w under suitable conditions, treated with several filtering 
materi ici, cook: as charcoal, bone charcoal, yal earth, French chalk 
aod the like. The effect of exposure to air and sunlight, both separately 
and collectively, was studied. Further, the effect of galpaucis acid and 
caustic soda was 
The fo haba conclusions were arrived at :— 
(1) Of a filtering materials used, bone charcoal and French 
cha la are teens best oe agents. All of them are in- 
ecti s deodoris 
(2) i posite. o sunlight pt brs adie improvement in 
colour but the odour still persi 
(3) troatehent with air alone inpeewes ‘the colour but the odour is 
not remove 
(4) Exposure to both air and sunlight combined has a very marked 
seat on Pgs colour. The odour, though not absent, is not 
(5) Sulphate ¢ acid reduces the colour very slightly, but the odour 
practically pendg em 
(6) Caustic soda acts both as a very good decolorising and a 
deodorising i. 
(7) In _ abe: blaagned alps the colour more or less comes back 
ing for a long period 
(8) Gu: heating all the deodori med sampl es, the odour becomes 
perceptible. On cooling, Sawacie. it disappears. 
Note on a new method of preparing nitrogen.—By H. 
Rat. 
Nitrogen gas may be readily p ed by passing an electric current 
through an am ee a chloride solcticns with platinum foil electrodes, the 
a and the cathode mbers bein 
Air is excluded from the electrolytic cell eee connecting 
an ure nit in cent 
of oxygen. It should, however, be colle ced eh over caustic soda solution so 
as to absorb any cane gas that may possibly be mixed with it 
Thi ords and ready met geod” ig the aap anata a a con- 
tinuous dioely of tite 5 bikkteon. 
Studies on the dependence of optical rotatory power o 
emical oe Part I—By B. K. Sinen me 
J. K. Mazump 
Frankland in 1896 (T. a ee) ree that the order of rotatory 
power of position isomerides shou 
ortho < unsubstituted nucleus < meta < para. 
This theory was again revived by him in 1912 in his Presidential Address 
to the Chemical Society cr 101, 634). With the object of testing 
