198 



EXPERIMENTAL FARMS 



2 GEORGE V., A. 1912 



These samples are essentially the same and practically of equal fertilizing value. 

 The data agree fairly closely with those obtained in previous years, and show that 

 this material is to be regarded more particularly as a nitrogenous fertilizer. It is, 

 however, one, also, that may furnish a notable amount of phosphoric acid. Valuing 

 its nitrogen at 13c, and phosphoric acid at 5c. per pound, No. 1 is worth $29.02, and 

 No. 2, $28.26, per ton. 



The use of dogfish scrap on the farm and in the garden has been dealt with in 

 previous reports, and various formulae have been given for the preparation of fertil- 

 izers to meet special needs. For information of this character the reader is more 

 particularly directed to the report of this Division for 1906. 



INSECTICIDES AND FUNGICIDES. 



LIME-SULPHUR WASHES. 



This spray continues to grow in popularity, both as an insecticide and a fungi- 

 cide. With many orchardists, its use has entirely taken the place of Bordeaux 

 mixture. At first employed simply as a winter spray on dormant wood to destroy 

 scale insects,' it is now still more widely, in a diluted form, coming into favour for 

 summer use to combat the attacks of injurious fungi. 



The tendency now among orchardists is to purchase the commercial concentrated 

 article rather than to go through the somewhat troublesome operation of preparing 

 the wash on the farm from its constituents, lime and sulphur. The commercial wash 

 keeps well if air is carefully excluded, and simply requires dilution to be ready for use. 

 In the annual report of this Division for 1908 and 1909, the whole subject of these 

 lime-sulphur sprays has been discussed, giving formulae and directions for the home 

 preparation of the wash and the composition of the more important commercial 

 brands on the market. 



The analyses given in the subjoined table have been obtained from the examina- 

 tion of certain samples sent in during the past year. They represent, for the most 

 part, the composition of brands newly introduced on the Canadian market. 



Lime-sulphur Washes. 



Laboratory 

 No. 



8181 

 8182 

 8840 

 8910 

 8934 

 8935 

 893G 



Brand or Manufacturer. 



Acadia brand, Wolfyille, N.S 



Niagara brand, Burlington, Ont 



Lion brand, Brooklyn, N.Y 



Acadia brand, Wolf ville, N.S 



Pendray & Sons, Victoria, B.C 



Victoria Chemical Co., Victoria, B.C 



Ortho Lime-sulphur solution, Calif. Spray Chemi- 

 cal Co 



Specific 

 Gravity. 



1-191 

 1-306 

 1300 

 1302 

 1-301 

 1300 



1311 



Sclphur in Solution. 



Total. 



P- 



15 

 21 

 26 

 25 

 26 

 25 



•51 

 ■97 

 09 

 ■72 

 •58 

 •36 



26 26 



As Sulphide. 



P- 

 13 

 21 

 -25 

 25 

 26 

 24 



•31 

 •60 

 •39 

 33 

 12 

 •83 



25-70 



No. 8181. — This sample was from one of the first batches made at the recently 

 established factory at Wolfville. N.S. It is seen to be decidedly lower in sulphur- 

 content than the brands now generally put upon the market. Possibly this inferiority 



