143 
Table I. 
Experiments carried out in Beakers half-pilled with liquid 
(SOOCB.C. IN each) and covered with unsized PAPER: DIAMETER 
OF MOUTH OP Bbakerzz11*5c.m. 
Salt. 
Grams 
per litre. 
Quantity 
of liquid. 
Lead 
exposed. 
Lead dissolved 
(Mgms.) per 500cb.c. 
of liquid. 
cb.c. 
sq. cm. 
11 daj’s. 
21 days. 
Ammonmm Nitrate . . . 
... 0-20 ... 
250 .. 
50 ... 
1-8 
... 1-5 
.. 0-20 ... 
500 .. 
50 ... 
2-5 
... 2-5 
99 99 
.. 0-20 ... 
750 .. 
50 ... 
2-5 
... 25 
99 99 • * • 
.. 0-20 ... 
1000 .. 
50 ... 
2-5 
... 1-8 
Potassium Nitrate . . . 
.. 0‘20 ... 
250 .. 
50 ... 
2 5 
... 1-8 
99 99 • • • 
.. 0-20 ... 
500 ... 
50 ... 
1-5 
... 1-8 
99 99 
.. 0-20 ... 
750 ... 
50 ... 
1-3 
... 1-3 
99 99 
.. 0‘20 ... 
1000 ... 
50 ... 
1-0 
... 10 
Calcium Chloride . . . . 
.. 0-20 ... 
500 ... 
50 ... 
2-5 
... 3-5 
99 99 
.. 0-20 ... 
1500 ... 
50 ... 
1-3 
... 2-0 
Sometimes a slight increase is noticed in the quantity of 
lead dissolved by equal quantities of solutions, when the 
total volume of liquid is increased, on the other hand a 
slight decrease is sometimes noticed. I think that so far 
as these experiments go, we may conclude that a very large 
volume of liquid dissolves no more lead than a relatively 
small volume, when caused to act on the same amount of 
metallic surface. 
3. The second question calling for an answer is — Does 
the quantity of lead dissolved increase with increase of time, 
or is there a maximum reached after which no further in- 
crease is noticeable ? 
Various experiments were carried out. Pieces of clean lead 
were immersed in different saline solutions for three months, 
and were then subjected to the action of various liquids. 
Comparable experiments, omitting the previous lengthened 
immersion in saline liquids, were also carried out. Special 
experiments in reference to Potassium Carbonate are de- 
tailed, inasmuch as in my last paper I had provisionally 
concluded that in the presence of this salt, the solvent [action 
of water upon lead soon — comparatively speaking— reaches 
a maximum, 
