l\^] RELATIONS OF THE SERIES. 49 



As each t»f the three series consists ot 104 yeiirs, the three together 

 make 312 years, the length of oue graud cycle. However, as they do 

 not form a coutiiiiious series, it can not be maintained that they were 

 intended to embrace that period; in fact, if arranged consecutively, in 

 the order of time, there will be a break or interval between the close 

 of the first series and the commencement of the second amounting to 

 19 years, and between the second and third a break of 27 years. It is 

 therefore probable that all these series cover substantially the same 

 period, that is, that they overlaj) one another. 1 shall not enter, at 

 j)r^sent, into a discussion of Dr. Forstemann's opinion that this series 

 refers to the revolution of the planet Venus. 

 BULL, s — 19 4 



