DR. JOHN STENHOUSE ON VEGETABLE PRODUCTS FROM INDIA. 
153 
F. Analysis of the last {now crystallizahle) part of the distillation. 
I. 0*3980 griu. gave 1*1195 grm. CO 2 and 0*3395 grm. HO. 
II. 0*3875 grm. gave 1*0930 grm. CO 2 and 0*3225 grm. HO. 
From the foregoing analyses the following per-centage results were obtained*. — 
n. 
E. 
F. 
I. 
II. 
I. 
II. 
I. 
II. 
C =78*58 
78*26 
78*84 
78*90 
76*71 
76*92 
H= 9*09 
9*06 
9*09 
9*20 
9*48 
9-25 
It will be seen, by the above analyses, that, during distillation, the stearopten 
undergoes partial decomposition, the amount of carbon being thus decreased. 
The analyses D. and E. were evidently made with an impure substance, but the 
analysis F. agrees in a surprising manner with the numbers calculated from the 
formula CisHnOj, which requires 
Ci5=:90 76*92 
H„=ll 9*40 
O 2 =10 
I do not however wish it to be supposed that the formula given above, or the double 
of it, viz. C 30 H 22 O 4 , is the true formula for that substance ; nevertheless I may observe 
that it bears a very simple relation to the formula of the stearopten itself. The one 
may be regarded as 
3C,o He+4HO, 
and the other 
SCio H6-1-3HO, 
that is, as two different hydrates of the same hypothetical hydrocarbon Hg, or 
C 20 Hi 2 , which perhaps might have been obtained by distilling the stearopten with 
anhydrous phosphoric acid. 
All the experiments which I made, v/ith a view of determining the basic or acid 
properties of the stearopten, gave negative results. When an alcoholic solution of 
the crystals was mixed with one of acetate of lead, no precipitate was formed, and the 
same was the case with nitrate and ammonio-nitrate of silver. The crystals of the 
stearopten dissolve when gently warmed in oil of vitriol, heat being evolved, and a 
purple colour produced. On standing the whole solidified, and the mass thus obtained 
was very soluble in water, yielding a colourless solution, with drops of a red oily liquid 
floating in it, produced probably by the action of the sulphuric acid on some of the 
hydrocarbon adhering to the stearopten. When dissolved in a small quantity of hot 
water the copulated acid was deposited, on the cooling of the solution, in fine colour- 
less scaly crystals. I regret that the small quantity of the substance at my disposal 
prevented me from determining the equivalent of the stearopten by means of the acid 
or one of its salts. I obtained both the baryta and the lead salt in a crystallized 
