150 
Table VIII. 
Effect of Eolling and Hammering on samples of Commercial 
Lead (Beakers). 
Sample No. 1. 
Surface 
Lead dissolved, 
Salt. 
Grams 
of Lead. 
Nature of Lead. 
in Mgms., after' 
per litre. 
sq. cm. 
6 day.o. Ifdaj’s.^ 
Ammonium Nitrate.. 
0-20 . 
.. 25 . 
.. As purchased. 
. 1-5 ... 1*0 
99 99 
. 0-20 . 
.. 25 . 
. . Several sheets ' 
) 
rolled together 
then hammered ^ 
>27-0 ...10-0 
1 
99 99 •• 
0-20 . 
.. 25 . 
.. Several sheets ' 
hammered to- ( 
gether, not ( 
► trace... trace 
rolled 
Kolling several sheets of this lead together enormously 
increases the solvent action of Ammonium Nitrate upon the 
sample : hammering several sheets together has an opposite 
effect. 
The following experiments illustrate the effect of rolling 
the original samples of commercial leads into thin sheets. 
Table IX. 
Experiments carried out in Corked Flasks. 
Sample No. 1. 
Surface 
Lead dissolved, 
Salt. 
Grams 
of Lead. 
Nature of Lead. 
in Mgms., after 
per litre. 
sq. cm. 
6 days. 15 days. 
Water 
. — 
.. 25 . 
..As purchased.... 
..trace... trace 
Potassium Nitrate.. 
. 0-20 . 
.. 25 . 
• • 99 • 
.. 0-3 ... 0-4 
Ammonium „ 
. 0-20 . 
.. 25 . 
• • 99 
.. 1-5 ... I’O 
Water 
. — 
.. 25 . 
..Polled out till' 
much thinner . 
1 none . . . none 
Potassium Nitrate.. 
0*20 . 
.. 25 . 
‘ • 99 
..none... none 
Ammonium ,, 
. 0-20 . 
.. 25 . 
« • • 
..trace... trace 
Sample No. 2. 
Water 
— 
. 25 . 
..As purchased,... 
.12 0 
Potassium Nitrate.. 
. 0-20 . 
.. 25 . 
• • 99 • 
. 5-0 
Ammonium „ 
0-20 . 
.. 25 . 
. • 99 • 
.12*0 
W^ater 

. 25 . 
..Polled out till' 
1 , , 
much thinner ^ 
‘ Lx cLC/ti/ • • • LJL^L/0 
Potassium Nitrate.. 
0-20 . 
. 25 . 
. . •• 
.trace... trace 
Ammonium 
0-20 . 
. 25 . 
•• 99 «• 
. — ...100 
