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Ml-. Fletcher. — The most convenient way is to place the barrel on its side. 

 Now, I think probably the difference is this : The London purple you cannot rely on 

 as being of a certain strength. There is no doubt very much more arsenic in London 

 purple, which is in a soluble form, than in Paris green. I never saw the advantage 

 at all of using London puri)le. Paris green itself is extremely cheap, so there is no 

 advantage in using London purple on the score of economy ; the one advantage is its 

 colour. It is unlike any vegetation and you can see when your tree is sprayed. 

 With London purple it is difficult to make a mistake and spray a tree twice, unless 

 you are very careless indeed. But with Paris green, if you are running down a row 

 and are called off, it is an easy matter to spray a tree twice, and if you do you may 

 put on too much and injure your trees. This is owing to the colour of the Paris 

 green. If you use a small quantity of flour with the Paris green you will have a 

 certain amount of colour, as well as render the poison more adhesive. Mix your 

 Paris green with a little water first, and then put in the flour and get it thoroughly 

 stirred. One important fact in making the mixture of Paris green is, you must 

 remember that it is a mixture only, and not a solution. It is almost insoluble in 

 water. What you have is a mixture with Paris green in suspension. It is conse- 

 quently necessary to keep the mixture all the time agitated. This is generally done 

 by having an agitator attached to your pnmp, which may be made in a simple way 

 by attaching a bar to the handle of the pump which is attached to a cross-bar in the 

 barrel, and when the pump handle is in use the mixture is sufiiciently disturbed to 

 keep the Paris green thoroughly mixed. The pump I have used works to the bottom 

 of the barrel, and it is perfectly easy to clean out the barrel every time I use it, 

 although, of course, after a continuous use of the barrel, if it is not washed out the 

 Paris green would accumulate around the edges and in the barrel to an extent to be 

 hurtful. 



Mr. Starr. — I find that it is quite necessary for me practically to test all these 

 arsenical poisons. I have just as much trouble in finding the strength of Paris green as 

 I had of London purple. The trouble is just this : there is such a demand for Paris green 

 now that it is becoming adulterated, the same as any other substances which you 

 buy. The dishonest men adulterate with something else. Some years ago I found 

 it was necessary to spray some trees for canker worms. I took some of the Paris 

 green, I had been using in previous years and went over the trees. I kept the right 

 strength, and to accomplish the work I found I had not enough to go on, and the 

 next day secured some more, making it of the same comparative strength, and in a 

 day or two I found I had done no good whatever. The canker worms were still 

 going on. It is necessary in advance to test the strength of the Paris green on the 

 foliage and trees, and from the experiments I got the strength I required. In using 

 London purple I to-day would rather take it than take the Paris green sold, because I 

 think it is no more difficult to find the strength of it than it is to find the strength 

 of Paris green. I even think that it is more easily commingled with water, and not 

 so liable to settle as Pari* green. , 



Mr. Pettit. — I would like to ask if that kerosene emulsion referred to is strong 

 enough for Thrip on the grape leaves. 



Mr. Pletoher. — I have never made the actual experiment, but I believe it would 

 be the most efficient remedy, and have advised its use in my reports. Mr. John 

 Lowe the Deputy Minister of Agriculture, informs me that he has procured good 

 results by dusting the vines with powdered sulphur. In hot weather there is an 

 odour given off which keeps the insects away. I believe the kerosene emulsion 

 would be found the most convenient remedy for this insect. 



Mr. PisK. — ^Last year I tried the kerosene emulsion on the grape vines for the 

 Thrip with good results. 



Eev. Mr. Fulton. — I have used London purple, and I have such an arrange- 

 ment as has been described for stirring the mixture in the barrel. After putting 

 the London puiple in the barrel and mixing it up, and if the barrel was not emptied 

 properly at the end, there is a deposit of particles that do not dissolve, and the result 

 IS that towards the end the trees are injured. The remedy that I insisted upon was, 



