OISEASaS OF TREES HEREDITART. 



Notice from a Work of Monsieur Lelieuk, on the hireditury 

 Diseases of Fruit Trees : hu the Right Hon. Sir Joseph 

 Banks, Bart. K. B. P. R. S". t5fc.* 



LELIKUR, a French gentleman who holds the office 



i5g 



M. 



crown, has lately published a book on the diseases of Fruit 



Trees. 



In this he asserts, that the disease called in French le llanc, „ .• 



. . ' Hereditary 



or Le meunier , which shows itself by a mealy whiteness on the clisenses in the 



leaves of the peach tree, or on the fruit itself in blotches, V^^^'^ tree, 

 that destroy the flavour, is an hereditary disease : that plants 

 raised from the kernels of trees subject to this disease, will 

 produce plants in like manner infected, and which will com- 

 municate the disease to grafts taken from sound tr^es inserted 

 in them ; and that grafts from diseased trees will certainly be 

 diseased, although taken from branches that are quite free 

 from it. 



He attributes the S3m6 hereditary continuance to tlie^K/rf, q^^^I^^j.^^^ 

 a disease more mischievous possibly than any other, to our Oitary. 

 grafted and budded stone fruits ; and he is of opinion, that this 

 disease also may be entirely avoided, by grafting from trees that 

 never have been subject to its attacks. 



The importance of these facts to the interests of horticulture, 

 will, it is hoped, justify the writer for offering this short account 

 of them to the society, though they are taken from the Moniteur 

 of the 7th December, 1311, the book not having been yet 

 brought into this country. 



The mealy disease, he says, is certainly not contagious, and ™j , 



bo instances a fruit-wall at Versailles, on which are many disease noi. 

 cwx\o\:^s peach trees, some of which are much damaged by it, '^°"^3<,mou.s. 

 while others are intirely free from it. 



XIII. 

 SCIENTIFIC NEWS. 



Medical and Chemical Lectures. 

 N Monday, October 5th, a course of lectures on physic Medical an4 

 and chemistry will re-coram.ence in George Street, j^g™ 

 JIanover Square, at the usual morning hours,, viz. .the Thera- 

 * Trans, of the Mort. Soc. Vol i. App p. 27. 



o 



