ELECTRODYNAMIC QUALITIES OF METALS. 
699 
December 7, 1874. 
112 lbs. On and Off. 
XYI. 
No current*. 
XVII. 
Current flowing. 
z 
362 
357 
On .... 
404 
+ 42 
377 
+ 20 
Z 
365 
354 
Off ... 
342 
-23 
335 
-19 
z 
360 
352 
On ... 
386*5 
+ 26*5 
372 
+ 20 
Z 
360 
352 
Off ... 
336*5 
-23*5 
334 
-18 
Z 
365 
353 
On ... 
393 
+28 
374 
+ 21 
Z ...... 
364 
353 
Off ... 
339 
-25 
335*5 
-17*5 
Z 
........ 362 
362 
On .. 
388 
+ 26 
380*5 
+ 18*5 
Z 
365 
353 
Off ... 
340*5 
-24*5 
334*5 
-18*5 
Z 
367 
353 
On ... 
391 
+ 24 
372*5 
+ 19*5 
Z 
367 
350 
Off ... 
345 
— 22 
331*5 
-18*5 
Z 
367 
357 
On ... 
390*5 
+ 23*5 
376*5 
+ 19*5 
Z 
369 
360 
Off ... 
347*5 
-21*5 
341 
-19 
z 
369 
359 
On ... 
394 
+ 25 
379 
+ 20 
Z 
369 
357 
Off ... 
346 
-23 
331*5 
-25*5 
z 
370 
354 
On ... 
393 
+ 23 
373 
+ 19 
Z 
370 
353 
Off ... 
347*5 
-22*5 
333 
-20 
z 
370 
349 
On ... 
392 
+ 22 
368 
+ 19 
Z ...... 
368 
346 
Off ... 
345*5 
— 22*5 
326 
-20 
z 
365 
346 
On ... 
392 
+ 27 
366 
+ 20 
Z 
364 
342 
Off ... 
341*5 
-22*5 
322 
-20 
The effects here observed were diminutions and augmentations of residual magnetism from previous operations. 
