356 Agricultural Journal of Victoria. 



generally recommended for nse is 6* O' 50, that is, () lbs. bluestoue, 

 lbs. washing soda, and 50 gallons water. Its great I'ecommendation 

 is that it is a solution, and not a mixture, and has therefore no 

 tendency to clog the nozzles, and may be used in localities where 

 fresh lime is difficult to obtain. But on the other hand it has not the 

 adhesive property of the Bordeaux mixture, and leaving no 

 perceptible deposit when the spray has dried, it is impossible to see if 

 the work has been thoroughly dcine — no small matter in a large 

 orchard. 



'J'his season (1903) thv same experiments have been rej)eated, 

 Avith the addition of various strengths of the Bordeaux mixture. 

 The one generally and successfully used by me has been the & 4' 50 

 formula, but the stronger one of 6* 4* 40 has also been used. In a 

 Bulletin just come to hand from the New Jersey Agricultural 

 Experiment Station, dated June, 1903, the standard formula given is 

 6' 4' 60, but as the American gallon of water weighs only 8A lbs., as 

 against 10 lbs. for the Englisli, this American standard, 6' 4* 60, is 

 the same as our standard, & 4* 50. 



There is another combination known as Soda-Bordeaux, which 

 has also been tried, in which commercial caustic soda is used in 

 connection with the bluestone, and a small ])roportion of lime may be 

 added to render the mixture perfectly safe. 



II.— Killara Experiments. 



~ The main object of the experiments here was to demonstrate on a 

 large scale the treatment which had already proved itself so 

 successful upon a limited number of trees, and to this end a spraying- 

 plant was fitted up, so that the necessary operations could be 

 performed expeditiously and successfully. Every facility was 

 afforded by Mr. Syme for the proper carrying out of this object, and 

 at the same time tests were made on a small way similar to those at 

 Doncaster, and the effect of spraying trees in bloom was also 

 observed. 



Si'KAYiNG Plant. 



In a large orchard where spraying operations have necessarily to 

 be conducted within a limited time, it is essential that the mechanical 

 appliances are such as will enable a continuous supply of the 

 spraying material to l)e available, and the spray-pumps kept 

 constantly at work. A detailed account has already been given in 

 Bulletin 3 of the pro])er metliod of ])reparing Bordeaux mixture, and 

 the precautions necessary to be taken, so that it is only necessary 

 here to show how it may be best applied. The photographs taken at 

 Killara represent a most convenient and inexpensive plant. As will 

 be readily seen, the pump is fitted over a race, and the water is 

 directed into the barrels as required by means of the long shoot. 

 When both lime-milk and bluestone solution have been made, the 

 taps of the barrels are turned, and both of the liquids fall into a 

 wide receptacle at the end of a shoot which is inclined to run the 



