dev elopement of magnetic al properties in steel and iron , &c. 209 
But on repeating the process several times on the following 
day, the power rose to 482 120 = 602. 
This process was again tried some days afterwards, and 
applied with considerable labour, the hammering being con- 
tinued for half an hour together, sometimes by one process 
and sometimes by the other. At the commencement of the 
operations it was found to have retained of its former energy 
a lifting power of 389 grains. This was considerably aug- 
mented, but it never reached quite so high as before. 
No. XVI. 
Wire S tii , 12 inches in length and one-sixth of an inch in dia- 
meter ; being the same that was used in experiments V. VI. and 
VII. when the maximum lifting power obtained was between 
32 6 and 389 grains . 
a. b. Both processes alternately . 
After a little hammering this wire now lifted 389 grains. 
But after many repetitions on the same day £July 15J it 
refused 482 grains, though its former power was somewhat 
increased. 
a. Simple process. 
Some days after the preceding trial, when the great bar, 
liv. had become strongly magnetic (after the conclusion of 
experiment No. XIV), this long wire was again subjected to 
experiment, when its lifting power was increased to 482 -j- 
180 = 662 grains. 
A piece of this wire, four inches in length, was now cut 
off, and the larger part was thrice hammered by the simple 
process, when its lifting power was 482 -f 90 = 572, being 
a loss of 90 grains. 
mdcccxxiv. E e 
