NOTICES OF BOOKS. 89 
The second table deals with the respective productiveness of the 
ossed and self-fertilised plants of the successive generations; the 
fertility of the crossed plants is taken as 100. 
raat RON - crossed and selfs een sepsis growing 
competition with one another. xty-five capsules pro- 
ed fro owe 
by their own pollen, contained seeds in the ae 
eee 100 to 93 
Fifty-six spontaneously self-fertilised ‘capsules on the above 
five crossed plants, and twenty-five spontaneously self- 
fertilised. capsules on the — five self-fertilised plants, 
yielded seeds in the proportion of to 99 
Combining the total number of ccna produced - these 
plants, and the average number of seeds in each, the 
above a and self-fertilised — vised: seeds in 
the proport: f 100 to 64 
Other — of this first generati on grown under unfavour- 
able conditions, and spontaneously self-fertilised, yielded 
ec n the proportion of 100 to 45 
Third Sanctus of crossed and ath fertilised Plants.— 
Crossed capsules, c a self-fertilised capsules, 
nD ds in sisi er 100 to 94 
An equal number of crossed wt self- fertilised plants, "both ‘ 
te Bae self-fertilised, produced — in eee 
of 
And th ese capsules contained seeds in t the ratio of 100 to 94 
Combining these data, the productiveness of the c ossed to 
the self-fertilised poems both spontaneously self-ferti- 
100 to 35 
—Cap- 
sules from flowers on the crosse “ leis ertilised — 
pollen from another plant, eae sed wl from f 
ion 
Fi i ara of crossed and. self-fertilised is —The 
rossed plants produced spontaneously a vast number 
more me (not actually counted) than the self-ferti- 
—: and these contained seeds in the ee 
100 to 89 
tee crossed plan spontane —. self. 
lente self- P rtiliced plants es self-ferti- 
lised, yielded pa arom (the average number of seeds per 
e not hayin n ascertained) in the proportion 
0 
Plants derived from a cross with a a fresh stock compared with 
tntererossed Plants .—The offspring of in 
of the ninth generation, crossed by a fresh stock, com- e 
pared with plants of the same stock in intercrossed during 
- 
100 to 26 
% 
