8 HORTICULTURIST'S RULE-BOOK. 



of pyrethrum, made by filtering 1 gallon of kerosene through 

 2^- pounds of pyrethrum. Valuable. 



Kerosene and condensed milk emulsion. Kerosene, 2 

 gallons, or 64 per cent of the entire mixture; condensed 

 milk, 4 cans of f pint, or 12| per cent ; water, twice the 

 quantity of milk, or 25 per cent. 



Kerosene and milk emulsion. Sour milk, 1 gallon ; kero- 

 sene oil, 2 gallons ; warm to a blood heat and mix thor- 

 oughly. Dilute 10 times with water. For scale-insects and 

 plant-lice. 



Kerosene and water emulsion. Goff atomizes kerosene and 

 water as follows : To the Woodason atomizing bellows a 

 small cup is attached directly in front of the fount for hold- 

 ing the liquid to be atomized. From this cup a very slender 

 copper tube is passed through the side of the fount where it 

 enters the larger tube that conducts the liquid from the 

 fount to the mouth of the bellows. It then curves upward, 

 passing through the centre of this tube as far as the mouth 

 of the bellows, where both come to an end at the same 

 point. Kerosene is then placed in the added cup, and water 

 in the fount. On working the bellows the liquids are 

 atomized together. The proportion of kerosene emitted 

 will depend upon the relative diameters of the two tubes, 

 but it may also be regulated by the relative depths of the 

 liquid in their respective founts. A better way would be 

 to use but a single fount and to divide this into two parts, 

 one for kerosene and the other for water. This would per- 

 mit the mouth of the bellows to be brought nearer to the 

 plant to be atomized. 



The value of kerosene applied in this manner is not yet 

 fully determined. 



Lead, arsenate of. See under ARSENITES. 



Lime spray. Slake |- peck or a peck of lime in a barrel of 

 water, straining the lime as it enters the barrel to prevent 

 its clogging the pump. Apply in a spray until the tree 

 appears as if whitewashed. For rose-chafer. 



London purple. See under ARSENITES. 



