CURRENT LITERATURE 393 
slight and possibly not significant. Between weight and height, as might be 
expected, there was considerable positive correlation, ranging from 0.274+ 
orr to 0.718+0.006. By securing data covering three years from the 
same series of plants, an interesting new relation has been developed, namely, 
the correlation between the condition of plants in one year as compared with 
The lowest correlation was found in comparisons between non-consecutive 
years, as when 1905 was compared with 1907. This would naturally be . 
coefficients are considered rather low, and are taken to indicate the 
importance of comparing individuals during several years as a safe basis for 
selection in economic breeding, since there are very good chances that an 
__ individual observed to - superior in one season may be inferior in succeeding 
_ Seasons.—Gro. H. Suu 
_ Seeds of horseradish.—It is a well known fact that the horseradish (Coch- 
maturity. These 15 mature seedling plants of the horseradish were not uni- 
form, but were referable to two types, neither of which agreed with the char- 
acters of the parent. The ordinary horseradish is intermediate between these 
two types, though inclining much more strongly to one of them than to the 
other, Both types of seedlings proved to be somewhat fertile, producing a 
considerable number of seeds, even without the operation which induced seed- 
7 BrzeziXsxr, J., Les graines du raifort et les résultats de leurs semis. Bull. 
Cracovie, Session of July 5, 1909. pp. 392-408. pls. 12-15. 
