W. A. Norton on Molecular Physics. 199 
near, the part of the ecliptic in which his ordinary action is the 
greatest. We must conclude then that from 1750 to 1766 the 
normal condition of things at the two nodes was greatly changed; 
and that the action of Saturn conspired with that of Jupiter, to 
produce the anomalous results. 
In view of the general results that have now been obtained, 
We may infer, (1.) that in general the action of a planet to pro- 
duce spots is greatest in the portion of the ecliptie which contains 
the descending node of the secondary magnetic equator, and 
least in the opposite portion; (2.) that the action is approxi- 
mately the same at corresponding points, on one side and the 
other of either node. But the indications are that a somewhat 
greater liability to epochs of maxima exists when the planet is 
on the side of the line of the magnetic nodes toward which the 
Progressive motion of the sun is directed, than on the opposite 
side. This is most observable in the case of Saturn, for his 
average position at the epochs of maxima was 236°, while that 
of Jupiter was 183°, 
examination in detail of the diverse positions of the 
about 0°, or at the ascending node, and a secondary minimum 
rm 
changes in the space from 320° to 70°. These positions of max- 
. 
d z 
Secondary magnetic currents developed by the sun's pr ive 
Motion,—in ao unction with the codperative action of the elec- 
