258 Transactions. —Chemistry. 
Poverty Bay petroleums at considerably higher temperatures. It is obvious, 
therefore, that this sample is not a mixture of the two, as naturally suggests 
itself, but a bond fide production. I believe it to be the former oil re-distilled, 
but in a natural way. 
The oil, submitted to distillation, afforded the following results :— 
40 per cent. colourless oil at specific gravity ... 800 
33 и pale coloured oil > “› е ВОВ 
125 „. yellow М м ae pi ee 
Бар, em Xr A es vs 860 
425 ,, ‘870 
96-00 — Total distilled off. 
4 —Residue in retort. 
100-00 
The residue is oil saturated with paraffin. Tt sets at common temperatures, 
The only oils containing paraffin are those of specific gravity :860 and 
'870. It will thus be seen that 85-5 per cent. of the distillate is uncontami- 
nated with this substance; so that, allowing 14 per cent. for light oils, we 
have 84 per cent. of an oil obtainable from this petroleum fit for use in our 
kerosene lamps, and this by a single distillation and without subjecting it to 
the action of any purifying agents. x 
By two more successive distillations of the first two samples I obtained oil 
amounting to 66 per cent. upon the crude oil, and having a specific gravity of 
'811, or that of common kerosene. This was almost colourless, and had not, 
I believe, acquired any darker shade since it was distilled. Two per cent. of 
the lightest oils have been removed from this sample. 
The lightest oils I have yet distilled from this petroleum by three successive 
distillations have a specific gravity of 778, 770, and 754 respectively. The total 
quantity amounted to 4 per cent. upon the sample taken. The heaviest oil 
obtained has a specific gravity of :871; its quantity, 2 per cent. upon oil 
taken. This is, therefore, certainly a first-class oil. 
For purpose of comparison, I now detail the results of my examination of 
a brand of kerosene much used here—a good kerosene, burning well, and still 
а safe one. Taking of this oil the same quantity which I did of the two 
petroleums just described, I obtained these results by its distillation :— 
Specific Gravity. 
4 per cent. at -7202 
1 » 740 
» ‘768 
12:5 = 809 
C28 в 821 
6:25 es 8964 
4 » 8287 
