32 The Spraying of Plants. 



tents of the barrel were well stirred before any of the mixture 

 was removed. 



" Bouillies bourguignonnes" is the name which Gaillot pro- 

 posed, in 1888, 1 for the designation of the Bordeaux mixture 

 which contained only one or two kilos of copper sulphate. The 

 name never came into common use, for the term "bouillie bor- 

 delaise " was so well known that it could not be easily sup- 

 planted, however just the cause for dropping it may have been. 

 Millardet recommended a similar formula in 1887, as a modifi- 

 cation of the original. 



Gaillot says that in 1886 he protected his grapes perfectly by 

 the use of the mixture of sulphur and the bouillie bourgui- 

 gnonne. He made the first application in April, using a mixture 

 containing two kilos copper sulphate ; about eight days after 

 flowering he applied the weaker mixture having only one kilo 

 of the sulphate. The third treatment was made late in the sea- 

 son, and the vines were injured neither by fungi nor by the 

 materials. 



Powders. 



During 1886 Millardet experimented extensively with pow r - 

 ders. He used them upon the vines in the hope that they 

 would prove as valuable as the liquids then in use. Apparatus 

 for applying powders had already been manufactured and it 

 was very desirable that an efficient preparation might be 

 found. The one that appeared to be the most promising was 

 the Podechard powder. 2 It was made by Louis Podechard, of 

 Gigny, according to the following formula : 



Quicklime 100 kilos. 



Sulphate of copper 20 " 



Flowers of sulphur 10 " 



Wood ashes 15 " 



Water at 20 C HO liters. 



The sulphur should be added after the other ingredients 

 have been allowed to stand twenty-four hours. Then mix all 

 together, dry the mass, and force it through a fine sieve. 



1 .four. d'Ag. Prat. 1888, May 24, 733. 



2 Ibid. 1887, May 5, G42. See also Bulletin du comite d' Agriculture de 

 PArrond-inseineJit de Heaurif, October, 1885,4-10; Jour. d'Afj. Prat. 1885, 

 Dec. 3, 803. 



