BOUILLIE BOEDELAISE. 249 



incorporate it in the milk of linae. By adding the sulphur gradually to 

 the milk of lime a yellow, homogeneous paste is obtained, which is after- 

 ward run into the solution of blue vitriol. This operation of moistening 

 sulphur is, moreover, now simplified by the use of the moistenable 

 sulphurs of commerce, the composition of which is as follows : — 



TABLE XhY.— Showing Compositio7i of Moiste7iable Sulijhnr. 



Lb. Lb. 



Sublimed sulphur '70 80 



Carbonate of soda "20 10 



Powdered rosm 10 o 



By adding, at the time of application in the vineyards, 2 lb. of the 

 moistenable sulphurs to 1 lb. of blue vitriol in solution, there is ob- 

 tained forthwith a sulphurated bouillie bourguiguonne. This bouillie, 

 used as soon as made, possesses the double property of preventing 

 oidium and mildew. The more freshly made the more it adheres. 

 The amount of sulphur used in these sulphurated bouillies, as Guillon, 

 Cucovitch, and Gervais have shown, should not be more than 2 or 

 3 per cent. But these bouillies have one defect, the sulphur tends to 

 deposit ; on the other hand, they have the advantage of containing 

 perfectly neutral sulphur, which can no longer burn the leaves. The 

 sulphuric aoid cont lined in the sulphur, and which is often the cause 

 of these burnings, is, in fact, often neutralized in these bouillies by 

 the lime or by the carbonate of soda. So the direct producers most 

 sensitive to sulphur, which generally cannot be sufficiently protected 

 against oidium, behave well towards sulphurated bouillies. The latter, 

 by the readiness by which they lend themselves to the simultaneous 

 treatment of different cryptogamic diseases, constitute a real progress. 

 Their use enters more and more into current practice, the more so as 

 the results obtained by Guillon are confirmed. Cucovitch pointed 

 out, in fact, at the International Agricultural Congress held at Rome, in 

 1903, the very decisive results obtained against mildew and oidium 

 with a bouillie of 1 per cent of blue vitriol, 1 per cent of lime, and 

 2 per cent of sulphur. Prosper Gervais likewise sulmiitted his vine- 

 yard of Gausses to this new treatment, and found four treatments of 

 sulphurated bouillie act as well as four sulphurings and vitriolizings 

 as ordinarily performed. The first treatment took place before flower- 

 ing, when the twigs of the stem had reached 12 inches. The 

 second was made after flowering, as soon as the fruit became apparent. 

 The third in the first fortnight of July, and the fourth in the first 

 fortnight of August. A single sulphuring, abundant and ^penetrating, 

 was made at the time of flowering, by means of Vermorels torpedo, 

 against the dropping of fruit and accidents of fertilization. According 

 to the experiments of Hoc, Quantin, Trabut, and Seignouret, it would 

 appear that the mono- and polysulphides of copper also act on oidium 

 and mildew, from which it would appear that the sulphurated bouillie 

 must act in any case. It is, however, acknowledged that sulphurated 

 bouillies containing no sulphur compounds of copper render the 

 most regular service in the struggle against these two diseases. In 

 spite of its notorious failure against oidium of the vine, bouillie horde- 



