SCIENTIFIC TRANSACTIONS 
OF THE 
iSO) Ge bY SAE BAIN erates ON Os ted han 
VOLUME III. 
I.—ON THE INFLUENCE OF MAGNETISM ON THE RATE OF A CHRONO- 
METER. By OTTO BQXDDICKER, Pu.D. 
[Read, December 18, 1882. ] 
I. 
TuE question lying in the title of the following Paper—viz., whether and how far 
magnetism is able to influence the rate of a chronometer—is nearly as old as the 
invention of chronometers itself, and since in 1798 8S. Varley published the first 
observations and experiments it has occupied the attention and time of a consider- 
able number of observers. In looking over all these observations, however, one 
cannot but remark that there has been very little progress made towards a final 
solution of the question, so that at present we are still nearly at the same point as 
that at which Varley arrived. The reason for this strange fact appears to me to be the 
very insufficient acquaintance with the observations and speculations made hitherto ; 
and as it seems most desirable to take the subject up again for careful and thorough 
experimental investigation—and since these experiments can hardly be of any 
value unless based upon the results already arrived at—I intend to give here a 
general discussion of all the Papers concerning chronometrical magnetism that have 
come to my knowledge. In this way it might be possible to lay down such rules 
and to point out such precautions as appear to be necessary to make eventual 
experiments the least open to objections. I hope I may not have omitted any 
Paper of importance; if I have done so, I should be obliged for information, 
since the utmost completeness is, for obvious reasons, desirable. 
B 
TRANS. ROY. DUB. SOC., N.S. VOL. III, 
