no 
Captain Kater on the best kind of steel 
Experiment 14. 
Magnets moved as before, but with 
strong pressure. 
Directive 
force. 
Parallelogram 
Rhombus 
Pierced rhombus 
1263 
IOO5 
1131 
No advantage appears to have resulted from the increased 
pressure, but the arrow-shaped needle has suffered a diminu- 
tion of power 
The magnets were now slid from the middle to the extre- 
mities of the needle at an inclination of only two or three 
degrees, and the following were the results. 
Experiment 15. 
Magnets inclined in an angle of two or 
three degrees. 
Directive 
force. 
Parallelogram 
Rhombus 
Pierced rhombus - 
1275 
1051 
1150 
This method appears to be preferable to any I have yet 
tried, and was therefore employed in the subsequent experi- 
ments of the present series. The rhombus of 63 grains, 
which in Experiment 10 was left with a directive force of 
577, on being magnetized in this manner had its power in- 
creased to 6 00. 
