-- 



»■■ 



^11. 



s. 



ui 

 1 



^or foil 



One 



> 



re 



icuitu 



•^ijured, 



■boa 



or 



^en be- 

 pro- 

 It there 

 ^tobe 

 Js acid, 



• above 



very of 



heat in 

 edata 



per 



fed. 







flial- 



a for a 

 j3il be- 



4 



.It 



5. By 



\i roots 



:he ie- 



J 



orm 



2. 



nts I'F 



) 



fe, as 



w 



rxi 





Sect. XII. 5. 



PULVERIZATION 



289 



much 



fs expence 



f labour 



But for the more perfea pulveriz 



f the foil, and the more complete aeration of it, he infias much 



on the preference of horfe-hoeing to hand-h 

 pafTes deeper into the foil, and thus expofes^ a 



to th 



air 



d 



fpecially of that part 



f 



as the form 

 greater quantity of 

 which before lay t 



much beneath the furface to be previoufly much affe^ed by 

 mbent atmofph 



But th 



great objeaion to the ufe of th 



horfe-h 



IS 



that the alternate rows of corn muft be placed at too 



& 



dift 



be ac^ain fpoken of in Sed. XVI 



2. 



T 



the many advantages of the drill hufbandry above recited Mr 



TuU add 



that 



th 



year 



th 



not 



where the fpring-turnips are ufed 

 time to brino; the land into tilth for barley, and 



which he fays is 



there Is a lofs of the barley crop in confeq 



:ly remedied by the drilling method 



for by that th 



d may 



be almoft as well tilled before the turnips are eaten or taken off, as it 

 can afterwards." Hufbandry, Chap. VIII. p. 89. 



So many great advantages feem to accrue from Mr.Tulfs method 

 of driU-fowing and horfe-hoeing, that a curious queflion offers itfelf. 

 Why it has not been more generally adopted ? Firft, I fuppofe, be- 

 caufe it is difficult to teach any thing new to adult ignorance, fo that 

 the mafter muft for fome time attend the procefs with his own eye. 

 Secondly, I believe the axle-tree of Mr.Tull's fowing machine did not 

 accurately emit the proper quantity of feed from the hopper, and was 



able to bruife and deftroy fome 



f it 



pafTa 



o 



And thirdly 



that the improved drill machine of Mr. Cook's patent is too expen- 

 fiveforthe purchafe of fmall farmers, who fearthat it may not an- 

 fwer the expeaed advantages. 



rhave therefore given a print at the end of this work of a machine 

 conftruaed on a cheaper plan, which is firaply an improvement of that 

 defcrlbed in Mr.Tull's book, by enlarging that part of the 



hich delivers th 



o 



into a cylinder of fome 



ch 



P 



P 



diarrieter 



with 



