On a new Infetl prejudicial to Apple Trees. 89 



And there will foon be a public library, an obfervatory, a 

 cabinet of philofophical inflruments, a chemical laboratory, 

 a hall of antiques, &c. Citizen Monge has been decled 

 prefident; the Commander in chief, vice-prefident ; and 

 Cit. Fornier, fecretary. 



XV. On the new InfeB fo 'prejudicial to Apple Trees ; and a 

 Method for extirpating them. 



W I T II I N thefe few years an infect, before unknown 

 in this country, has made its appearance in the Britifh or- 

 chards, which, if means are not generally taken to root it 

 out, will in a fliort period deftroy every apple tree in the 

 kingdom. It exhibits upon the trees the appearance of a 

 white efflorefcence, like what may be fometimes feen on 

 Hones in the fields : this feems, however, to be only the ha- 

 bitation of the infe&s, which exift in millions wherever they 

 have once lodged themfelves. On bruizing the efnorefeence- 

 like matter between the fingers, a deep red-coloured fluid 

 like blood is exprefled, and which probably is of that nature. 

 Already have feveral valuable orchards been much injured 

 by this infeft, which corrodes the apple trees in fuch a man- 

 ner as at laft completely to deitroy their organization and 

 to kill them, without the proprietors, many of them at leaft, 

 even once fufpefting the caufe. We hope what we now 

 fiate will be the mean of making the faa generally known, 

 and of inducing every perfon intcrefted to co-operate in 

 rooting them out. 



We arc happy in having it in our power to give them the 

 recipe of a cheap composition difcovered by William Forfyth, 

 Efq. his majefty's gardener at Kenfington, which has been 

 found effectually to anfwer the purpofe. It is as follows : 



Be. To 100 gallons of human urine add as much cow dung 

 as will bring the whole to the confidence of paint, with 

 which anoint the infeaed trees about the end of March. 



XVI. 



