Geology and Natural History. 491 
species. But M. Decaisne, not content with the reductio ad absur- 
Sr leesce; and the Ob irole. Of the last the ‘four trees raised bore 
fruit of fake different forms. From the Belle Alliance he obtained, 
Z late f 
pears raised from the An ngleterre. These rosea even led him to 
doubt the cases cited eb Darwin of the reproduction of = 
ears from seed, He insists, moreover, that very bad fruits may 
e raised from choice cultivated pears, and that good varieties 
may be obtained from the seeds of wild pears. The latter is not 
what one would expect in the first generation. 
Our author proceeds to state that the trees raised from seed 
taken from the same fruit differed, not merely in their dora and 
in the nad of ripening, but no less in their flowers and in the form of 
the lea Some were thorny, others thornless ; some produce 
slender shookés others thick and stout sa dc. It is worth 
n 
lanted were derived, whi ight ave influenced the product 
through the now well-ascertained influence of the pollen upon the 
peri We perceive, however, that would re his 
carp. 
unimportant, since pear-varieties are of the lowest grade, incepanie 
ely to impress by their pollen ‘characteristic upon t e 
poset of another variety.* lar, core ate of the uction is 
occupied with further evidence that the Pear-trees of ‘cultivation 
* Yet the apple, which i is in ss uae e case, does so. An interesting mmatance of 
this kind lately came under our notice, an apple from a spitzenberg tree, one-half 
to surf ai half t 
