226 OPEN AIR GKAPE CULTURE. 



To apply itj use may be made either of a common 

 dredger fixed to the end of a pole, or of a pair of 

 bellows with a contrivance for admitting a small 

 quantity of sulphur into the stream of air. Or it 

 may be mixed with water and the foliage syringed 

 therew^ith. But the most efficient method is that 

 proposed by Dr. Price, wdio was the first to suggest 

 pentasulphide of calcium for this purpose. 



This compound is j^repared by boiling 30 j^arts by 

 weight of caustic lime with 80 parts by weight of 

 fiowers of sulphur, suspended in a sufficient quantity 

 of water; heat is aj)plied until the solution has ac- 

 quired a dark red color and the excess of sulphur 

 ceases to dissolve. The clear solution is drawn ofi", 

 and after being diluted with 20 times its bulk of 

 water, may be applied to the vines by means of a 

 sj^oiige, brush or syringe. 



Where flowers of sulphur is used, it should have a 

 few drops of ammonia added before it is apjjlied to 

 the foliage, as the sulphurous acid with which it is 

 saturated (derived from its combustion during dis- 

 tillation) is always injurious to leaves and young 

 shoots. 



The rot has rarely troubled our northern vineyards, 

 though it is the great bane of vine culture in. Ohio. 

 "VYe are inclined to believe that if vines are planted 

 in soil, dry or well drained and not too rich, and ho 



