Vll. 



1. 



3 



fawbe 



t 



;the 



cure 



^ore latei 



y 



eagc 



toth 



•^^ration of 

 aeration by 

 ^ Source of 



'^ arc liable 



late, which 

 ftance that 



fexual pro- 



rmixture of 



counterad 



rent tree is 



II. p. 292. 



ere inferted 



I 



thefe have 



frequently 



produced a 



ith cuttings 



th has been 



leir time 



will be 1^' 



treeu 



fually 



e 



conc 



lude 



) 



vs 



n 



^hicb tbe 

 belie^^ 

 rolii^^' 



to 



elyP 

 jbably 



frotti 

 ever/ 



Sect. VII 



4 



REPRODUCTION 



97 



every other tree, will be afFeaed by the ftate of the parent flock 

 that be too young to produce fruit, it will grow with vigour, but 



If 



bloflbm 



d if it be too old 



ed lately prod 



fruit 



and confequently never anfwer 



but will never make a healthy 

 the intention of the planter. 



'' The durabihty of the apple and pear I have long fufpeded to be 

 different in different varieties : but that none of either would vege- 



with vigour much 



if at all, beyond the life of the parent dock 

 provided that died from mere old age. The oak is much more long 

 lived in the north of Europe than with us, though the timber is lef 

 durable; the climate of this country, being colder th 

 may in the fame way add to the durability of the elm 

 poffibly be further increafed by its not prod 



hich may 



feeds in th 



cli- 



mate 



the life of many annuals may be increafed 



period 



f not more, by preventing their feed 



o 



It is obferved above, that the firft bulb of a tulip 



fed from feed 



produces a more perfeft bulb annually for five or fix years, and perhaps 

 more than one lefs perfe£l ones, 



before it acquires the power of g 

 period arrives, if the feed-ftem be 



pinched off, I fuppofe that the next year's bulb or bulbs will become 



d if this be continued for three or four 



Derating feed 



Now w 



more 



years I fufped the double flowers, which are perhaps owing to a more 

 luxuriant growth, maybe formed ; and that in this, with fuperfl 

 nourifhment by manure, warmth 



nd moifl 



fifls the art of 



obtaining hyacinth 



ranunculus, and fometimes tulips, with fuch 



wonderful multiplication of petals or ned 

 4. The analogy, which exifl 



bet 



th 



. See Se61:. XIX. 

 s lateral produ(Sti< 



tables and that of fome tribes of infe6ts, is worth invefligi 

 This paternal or lateral generation of plants, which conflitutc 

 buds on the ftems of trees, and the fcions on their roots, which 



3. I. 



>n of 



\^j 



dhere to th 



are 



fo fa 



r refembled by the branching 



fed;s, which for 



or corallines ; and by many other fea 



O 



animals 



