On the London Horticultural Society. 391 



this mixture I, with Read's garden syringe, sprinkle over the 

 trees, putting it on the finest rose, and being careful to wet all 

 the leaves ; this operation is performed only in the hottest 

 sunshine, as the effect is then much greater than when the 

 weather is dull. In this manner I have, this spring, with five 

 gallons of liquor, reduced as above stated, cleaned seventeen 

 peach and nectarine trees, twelve of which average seventeen 

 feet in length and twelve in height. The black glutinous 

 insect, provincially called blight, so destructive to the cherry 

 trees, is destroyed in the same way with equal facility. I 

 have also found, upon trial, that the grubs which attack the 

 apricot, may be destroyed almost instantly by immersing the 

 leaves infested in this liquor. 



This is the cheapest and most expeditious manner of de- 

 stroying the above insects which has come within my know- 

 ledge, and to those who have not seen the operation per- 

 formed the effect produced is almost incredible. Roses, and, 

 in fact, any plant liable to be infested with green fly, and 

 situated where tobacco smoke cannot be used with effect, may 

 be easily cleaned by dipping in or sprinkling with tobacco 

 liquor, as circumstances may render most convenient. 



When trees have got so bad that their leaves are much 

 curled, some of the flies, being protected within the curl, will 

 escape : in this case more force must be applied to the 

 syringe, and in a day or two the trees should be looked over 

 again, and whatever part of the leaves has not been wetted 

 should be washed with a painter's brush ; but a careful person 

 will render this process unnecessary, by taking them in time. 



The liquor costs in Nottingham Is. 2d. per gallon. 



I am, Sir, &c. 



Thos. M'Laurin. 

 Bunny Park, Nottingham, May 22. 1826. 



Art. X . Remarks on the Affairs of the London Horticultural 

 Society. By a Friend to Facts. 



Sir, 

 Upon perusing a letter in your last Number (Art. XV.), and 

 your note respecting the Horticultural Society, I was struck 

 with the concluding sentence of the latter, viz., " We think it 

 very questionable if the present system, embracing so many 

 objects both at home and abroad, can be continued for many 



