HOME-MADE SOLUBLE OILS. 839 



caused some trouble in clogging strainers and nozzles. This may 

 have been due to an excess of rosin oil. The scale was kept well 

 in check by the application, and no injury to the trees was noticed. 

 Two barrels of this mixture, one made from crude and the other 

 from paraffine oil, were furnished to Mr. F. H. Stadtmueller of 

 Elmwood, who used it in April on rather large apple trees, apply- 

 ing it with a steam power sprayer. The residue was present in 

 the tank, though not especially troublesome. The mixture was 

 apparently effective in checking the scale and the owners were 

 satisfied with the treatment. 



A barrel of this mixture was used in the young apple orchard 

 of A. E. Plant & Son of Branford, the spraying being done April 

 20th. An examination of this orchard December loth showed that 

 the trees are in good condition, and though most of them were 

 only slightly infested at the time of treatment, it is now a difficult 

 matter to find any living scales. Two or three trees which were 

 badly infested two years ago showed but little live scale at this 

 time. 



Two barrels of the mixture made from crude oil were used in 

 the apple and peach orchards of Mr. W. F. Griswold at Rocky 

 Hill, in April. Mr. Griswold reported considerable trouble in 

 using thg material, and it did not seem to be very effective in 

 holding the scale in check. Mr. Walden visited the orchard on 

 December 2d and found the sprayed trees fully as scaly as those 

 which were not treated. It is hard to explain why the treatment 

 here was not more effective. 



The trees on the station grounds were again sprayed with 

 this material December 8th and 9th, 1908, and it worked satis- 

 factorily, though the effect upon the trees and their scale insects 

 cannot at this date be determined. 



In all of the tests just mentioned the oil was mixed with water 

 in the proportions of one part of oil to fifteen parts of water. 



The cost of the materials actually used in making this home- 

 made soluble oil was about twenty-one cents per gallon, not 

 reckoning labor, the cost of the kettle, or interest on the money 

 invested. Of course the cost would vary according to the fluctu- 

 ating prices of the materials used. 



This oil is now made by the Apothecaries Hall Company of 

 Waterbury, and sold as "Victor Soluble Oil," in barrel lots, 

 at thirty-five cents per gallon. It is also made by the J. T. 



