14 
Beppicker—On the Influence of Magnetism on the Rate of a Chronometer. 
North Pole. South Pole. 
Figure of Dial. | Figure of Dial. 
No. 3 No. 4. | No. 3. No. 4. 
3 + 0" 345 + 0741 3 + 2718° + 0" 445 
6 +1 28 -1 43 6 +5 27 - 0 36 
9 +5 22 +13 9 —0O 14 +0 41 
12 +2 47 +1 12 12 —-1.2 +1 24 
The first and fourth columns show the figure to which the magnet was applied, 
the other columns, the effect produced by the magnets during twenty-four hours. 
“The magnets were likewise placed in different positions out of the planes of the 
balances: the results were very similar to those above, but differing in quantity, 
according to the distance of the magnets from the planes of the balances.” Upon 
placing the magnets very near to the rim of the balances, a very rapid acceleration 
took place with both poles, and in every position; and upon too near an approach 
watch No. 1 and chronometer No. 3 were rendered useless, the former gaining 
75" after the removal of the magnet, the latter losing 50° in twenty-four hours. 
Further experiments with the chronometers showed the following changes of rate, 
the figures given being ‘‘the difference of the rates when the magnets were applied, 
and a mean of the rates of the chronometers before and after the application of the 
magnets.” 
North Pole. South Pole. | North Pole. South Pole. 
| Figure 
of Dial. | 
No. 3. No. 4 No. 3. No. 4. No. 3. No. 4. No. 3. No. 4 
| 8 | +0"2%7/+0"48%5) +1™24° | +046" | +0™81* | +1™14" |+9"8 | +0"48" 
| 6 Slay yd Wes ilec kos ay alias | | al Bi7/ -59 —1 24 |+4 25-7) -0 59 
| 9 +519 |4118 |-1 58 /|4+1 12 +5 25 14055 |-1 53 |+0 42 
| 
| 12 oh 143) jee al alaicyl|| ae Ws} ice al YAS +2338 /|415 —2 938 /4+16 
| 
These ‘Tables show plainly that No. 3 had been sensibly affected by the 
magnet, while No. 4 shows very nearly the same changes in all the three sets of 
experiments. Fisher draws from the above experiments, and from his observations 
made in Spitzbergen (p. 2, sey.) the conclusion ‘that chronometers will be gene- 
rally accelerated (particularly if their balances have not received polarity by the too 
