56 
TENTH REPORT. 
Among the results obtained from the different sets of experiments here 
worked out, three are given as indicated in the accompanying curve. The 
water used was distilled, the acid one-fiftieth normal sulphuric, and the 
pot ass-ferro-cy ankle one per cent. The figures forming the basis of these 
curves were obtained from a combination of several experiments, and not 
from one alone. In plotting the curve, the spaces measured vertically were 
made 3 cm., and the horizontal spaces each one day. 
HijSO^ 
From these results it might be inferred that the height to which water 
will ascend along the filter paper is about 75 cm., sulphuric acid 36 cm. 
and potass-ferro-cyanide 39 cm. 
In discussing the subject of ascent of sap in plants, capillarity is usually 
given as one of the factors, and from this experiment it might be fairly con- 
cluded that, supposing the cellulose of the conducting vessels and the wood 
