210 Contributions to Electricity and Magnetism. 
those found in galvanism. For this purpose a series of experi- 
ments was commenced in the spring of 1836, but I was at that 
time diverted, in part, from the immediate object of my research, 
by a new investigation of the phenomenon known in common 
electricity by the name of the lateral discharge. Circumstances 
prevented my doing any thing further, in the way of experiment, 
until April last, when most of the results which I now offer to 
the Society were obtained. The investigations are not as com- 
plete, in several points, as I could wish, but as my duties will not 
permit me to resume the subject for some months to come, I 
therefore present them as they are; knowing, from the interest 
excited by this branch of science in every part of the world, that 
the errors which may exist will soon be ica and the truths 
be further developed. 
The experiments are given Be me in the order in which 
they were made; and in general they are accompanied by the 
reflections which led to the several steps of the investigation. 
The whole series is divided, for convenience of arrangement, 
into six sections, although the subject may be considered as con- 
sisting, principally, of two parts. The first, relating to a neW 
examination of the induction of galvanic currents ; and the sec 
_ ond, to the discovery of analogous results in the discharge of ordi- 
nary riba ”. 
Fig. 1. 
a 
a cai No. 1, b coil No. 2, and ¢ coil No. 3; ¢ the battery, d the rasp- 
na The 5 principal articles of apparatus used in the experiments, 
: onsist of a number of flat coils of copper riband, which will be 
te ee en 
TT. Bs 
————— 
ra numbered in succes 
en foe eat er py De Fatdley 
ee 
