328 Researches on Solar Physics. 
we think, show that the influence of Jupiter is very great, 
although not apparently predominating. Thus when Venus 
and Jupiter are both in opposition to the earth, we might expect 
a very large average size of spots at the longitude of the earth; 
but if, Venus being in opposition, Jupiter is in conjunction with 
the earth, the average size ought to be much smaller. In series X 
and xv the former is the case, and for these the average size of 
a spot is exceptionally large. In series v, vii, and XvI the lat- 
ter is the case, and for these the average size of a spot is excep- 
of Venus during this period would be more nearly equal to the 
maximum effect of Venus than the effect of Jupiter would be 
to its maximum effect. 
to time, and to the minor fluctuations which occur in his diagram. 
_ We had previously proposed to ourselves a complete investl- 
