OF THE PINE-APPLE. 



821 



structive insects having been since seen in the hot- 

 houses here. 



From the time above-mentioned to the present, 

 (twenty-four years,) His Grace has several times 

 had Pine-plants sent from different parts of the 

 West Indies, which were generally infested with 

 one or both of the last species of insects ; these 

 plants, after the operation, I have put amongst 

 our sound stock, and always with the greatest 

 safety. 



The Receipt. 



Take one pound of quicksilver. Put it into a 

 glazed vessel, and pour upon it one gallon of boil- 

 ing water, which let stand till it becomes cold ; 

 then pour off the water for use. Repeat this on 

 the same quicksilver (for it will retain its powers) 

 till a sufficient number of gallons are provided to 

 fill a vessel intended for the purpose. One in the 

 form of a trough, that will hold eight or ten gal- 

 lons, is the most convenient, especially for the 

 large-sized plants. 



Then to every gallon of this mercurial water 

 add six ounces of soft green soap, dissolved in a 

 portion of the prepared water. Let the mixture 

 stand till it becomes about milk-warm, which is 

 the degree of warmth it must be kept to during 

 the time of dipping, which operation is performed 

 in the following manner : 



[Before the plants are taken out of their pots, 

 I would advise the brushing off a few of the scaly 



