I 





DISEASES 



Sect. XIV. i. lo. 



recommended to mow down thlftles, and other weeds, which are 



blefome from then' numerous increafe, early 



th 



fp 



3S 



manv of them 



die, and the reil: be much weakened by 



fap-flow, which attends their wounds at that feafon. 



In refpe(Sl to trees another period of fap-flow is faid to exilli, wher 

 the new buds are forming after Midfummer, as fpoken of in Se<5l. Ill 



2.8 



this 



Whence wounds at this feafon alfo mull: be in] 



h 



fs of fap 



hot-houfes various applications h 



been recommended by gardeners^ I fufpe<ft that a bit of fponge bound 

 upon the end of the cut branch, or on the wound, by means of fome 

 elaftic bandage, muft be the mofl certain apphcation ;. or a wire 

 twifted round the end of the branch cut off,, fo tightly as to ftrangu- 



late th 



w 



hole 



of] 



d 



fequently deftroy th 



part above th 



lo. 



Secretio gummofa 



gum fecretian, a morbid produdlion of 



c> 



um, which differs from the fap-juice above defer ibed 



facch 



quality, though like the former it 



fud 



es 



fro 



m 



t[ 



ie 



wounded alburnum of decid 



hether the wound be 



o 



lly caufed by 



difeafe, or by 



men 



d in the gangrene of the bark above defcribed 



Where this happens to cherry-trees, prunus cerafus, a gum ex- 

 fudes hke gum arable ; which in dry weather hardens, as it adheres, 

 and thus prevents the further difcharge of this nutritive material; 



otherwife the tree weeps away its life, perifliing from deficit 



In flmilar manner a refin Is emitted from the inj 



fhment 



or 



wounds of pine-trees, and fome other evergreens,, with 



1 nj u vy 



growth 



the deftrucftion of th 



/^ 



This exfudation of the gum or refin of trees, as it happens chiefly 

 in fummer, is probably a part of nutritious fluid defigned for the new 

 buds, which in moft deciduous trees are formed about this time, and 



fhould be prevented from 

 previoufly made fmooth 



:inuing to flow by binding on the part, 



knife, a metallic plate, as of the lead 



111 



