736 
PROCEEDINGS OF SECTION H. 
They were again soaked in the same oils as before. 
Date. 
Experiment. 
Boiled Oil. 
No. 1 . 
Raw Oil. 
No. 2 . 
Blue Oil. 
No. 3 . 
Not Oiled. 
No. 4 . 
1890. 
Nov. 12 
In oil for 24 hours— oil ab- 
lb. 
oz. 
lb. 
oz. 
lb. 
oz. 
lb. 
oz. 
1892, 
sorbed 
0 
ii 
0 
ii 
0 
5 
Aug. 4 
After being exposed on the 
roof to all weathers for 
661 days, the difference 
Aug. 5 
1893. 
was ... 
loss 0 
lj 
loss 0 
H 
loss 0 
4 
loss 0 
0i 
In water for 24 hours 
gainO 
l 
gainO 
l 
gainO 
1 
gainO 
41 
Sept. 5 
After exposure on roof for 
* 
7 months and indoors for 
6 months — difference 
loss 0 
i 
loss 0 
l 
loss 0 
2 
loss 0 
5 
Sept. 0 
In water for 24 hours 
gainO 
l 
gainO 
l 
gainO 
2i 
gainO 
5 
Dec. 7 
Exposed on the roof for 92 
Dec. 11 
days — difference 
loss 0 
l 
loss 0 
l 
loss 0 
u 
loss 0 
7 
In water for 96 hours 
gain 0 
i 
gainO 
l 
gain 0 
3 
gainO 
7 
Dec. 12 
In a dry place for 385 days 
to 
— difference 
loss 0 
l 
loss 0 
l 
loss 0 
2 
loss 0 
4 
Dec. 31, 
1894 
Dec. 31 
In water from 4 p.m. Dec. 
to 
31 to 5 p.m. Jan. 2, 1895 
Jan. 2, 
1895 
(49 hours) 
gainO 
l 
gainO 
l 
gainO 
1 
gainO 
6 
Jan. 4 
They were again soaked in 
water for 24 hours, when 
the weights were ... 
18 
4 
18 
6 
18 
9 
18 14 
W eight before soaking 
IS 
3 
18 
5 
18 
7 
18 
6i 
Difference 
gainO 
1 
gainO 
1 
gainO 
2 
gainO 
74 
* No. 4 was accidentally chipped, and lost | oz. in weight. 
CONCLUSION 
It is noticeable that the amounts of oils and water taken up by 
the sandstone is very much less than that absorbed by the bricks, 
although the area of the sandstone cubes is much greater than that 
exposed by the bricks — e.g., cubes, 8x8x8 = 512 superficial inches — 
against 121J inches exposed by the bricks. 
Equal amounts of the raw and boiled oils were absorbed. The 
blue oil, however, was taken up in much greater quantity by both the 
bricks and sandstone ; but by the end of twelve months the whole of 
the 13^ oz. of blue oil had apparently evaporated away, and the brick 
had returned to its original weight, but those treated with raw and 
boiled oils suffered much less loss. 
After the second oiling, in November, 1890, and exposure for 
four years and nearly two months, the bricks had practically retained 
all their oil, inasmuch as they had lost only 1 oz. in weight, and were 
also almost impervious to water. 
The blue oil seems to remain and to afford protection from 
moisture for less than twelve months, so that it is almost useless. If, 
however, it be more or less charged with the solid paraffins or other 
solid hydrocarbons, it will, of course, answer the purpose much better. 
