PARIS-GREEN. 359 



The following note on the subject from Mr. John Eiley, of 

 Putley Court, Ledbury, also shows the serviceableness of the 

 application, even without any note of the use of special 

 spraying machines : — " We tried Paris-green, London-purple, 

 and chrysoline, for the caterpillars. We began late, when the 

 caterpillar was strong. Paris-green we found by far the best ; 

 it killed the caterpillar in a short time, and did not damage 

 the foliage at all. It was used as recommended by your 

 Committee." — (J. Pt.) 



On the 20th of June Mr. Masters added a further satis- 

 factory note, with the following information and useful hint 

 regarding mixture of flour with the green : — 



"When the foliage of trees is young and tender, I do not 

 think it safe to apply the Paris-green stronger than in the 

 proportion of 1 oz. to ten gallons of water. But when the 

 foliage is matured, and the caterpillar is full grown, a 

 solution of 1 oz. Paris-green to 6 gallons of water may be 

 safely used ; for every case it would be well to use about 2 lbs. 

 of fine wheat flour to every pound of Paris-green ; it thickens 

 the solution, and prevents the particles of Paris-green from 

 settling at the bottom of the vessel, and, when it is sprayed, 

 helps to secrete the preparation on the foliage." 



The point which, at the date of writing, appears to be the 

 chief difficulty, is the risk of bright, hot sunshine occurring 

 after spraying, and causing mischief to the leafage. On 

 June 26th Mr. Masters wrote me that some of the trees 

 syringed with Paris-green then showed injury to the leafage 

 which had not been noticeable until the last few hot days. 

 This appeared to be attributable to the action of the heat 

 where the Paris-green mixture had been applied stronger 

 than was recommended, or where the syringe used did not 

 deliver it properly on the leafage, but so that it remained in 

 excessive quantity. 



It is of great importance not to exceed the proportions 

 specified in the preceding instructions; also 7iot to spray fre- 

 quently ; a fortnight should elapse between one application of 

 spraying and a succeeding one, unless there are special 

 circumstances pointing to some difference being allowable ; 

 and also to have a spraying apparatus which will deliver the 

 spray as a fine general mist, not as a wash which will drop 

 from the trees. 



When the form of " Strawsonizer " especially arranged 

 with a view to orchard use is issued, this may be expected to 

 be of much service as a spraying implement. Meanwhile, as 

 not only our own but other experiments were greatly held 

 back at first for want both of proper apparatus and also want 



