28G INSECTICIDES, functIcides, and weed killers. 



suffices to neutralize the acidity with copper carbonate. The bouillie 

 thereby becomes an albuminous bouillie bourguignonne, and contains 

 a mixture of carbonate and caseate of copper. Crouzel regards the 

 acid bouillie as the most active. Caseate of copper is comparatively 

 stable and remains rather long suspended in the liquid as finely 

 divided particles which do not choke up the machines, and cm be 

 perfecUy distributed over the suiface of the plant. Nevertheless, it is 

 necessary to use this bouillie the moment it is prepared. 



105. Bouillie Bordelaise Modifiee. — This name is appHed to a 

 bouillie to which a little skim milk has been added. Sorauer recom- 

 mends it against Uromycea Dianthi, Niessel (poppy rust). Cazeneuve 

 compared the adherence to the leaves of three albuminous bouillies, 

 which he made thus : — 



TABLE LVI. — Composition in Grammes of Cupro-Alhuminuus Bouillies. 



The blue vitriol was dissolved in 70 litres of water, the lime slaked 

 and beaten up with 20 litres of water and then run into the blue 

 vitriol soluiion. The milk was diluted with 8 litres of water, and the 

 solution of albumen and prepared blood in 10 liti'es of water ; these 

 solutions were finally run into the preceding mixture. The excess of 

 lime was used to fix the casein and the albumen as caseate and 

 albuminate of lime, and to preserve all its energy to the cupric hydrate 

 of the bouillie. The sprayings were made on 16 August, 1897, 

 some days before floods of rain, after which it was found that the 

 adherence of the lactic bouillie bordelaise was not appreciably better 

 than that of the saccharated bouillie. But the spots produced by the 

 evaporation of the albuminous bouillie lasted to the end of the season. 

 Galloway added a very strong dose of glue to bouillie bourguignonne. 

 The composition of this bouillie was: lilue vitriol 3 lb., soda crystals 

 3^ lb., glue 3^ lb., water 100 gallons. Adherence was perfect, and 

 the results obtained against black rot were : Untreated, 41-36 per cent 

 of sound grapes ; treated with ordinary bouillie bordelaise, 86-47 per 

 cent ; treated with the new glue containing bouillie, 100 per cent. 

 Unfortunately the cupric bouillie fixed on the whole surface of the 

 plant so far injured the vegetation that Galloway cannot, in spite of 

 the fine results obtained, recommend this new bouillie in preference 

 to bouillie bourguignonne. 



106. Soapy Bouillies. — Attempts have been made to increase the 

 adherence of different bouillies, and even of eau celeste by incorpor- 

 ating soap or oil. Copper salts form with fatty acids derivatives 

 insoluble in water and cold alcohol, but soluble in ether and in amylic 



