184 DISEASES OF GLASSHOUSE PLANTS 
proportional parts of these quantities. Thus for two 
gallons of spray the quantities are as follows: 
14 ounces flour. 
14 ounces potassium sulphide. 
2 gallons water. 
Two gallons of spray are prepared in the following 
way: Fourteen pints of water are placed in a bucket 
and 14 ounces of liver of sulphur added, which will 
completely dissolve while the flour paste is being prepared. 
A very little water is added to 14 ounces of ordinary 
wheat flour and the mixture carefully rubbed into a 
smooth paste. Water to 2 pints is then added till the 
mixture is as thin as milk and free from lumps. This is 
next boiled, with constant stirring, until it froths 
up, when it is added to the solution of liver of 
sulphur and mixed thoroughly. The spray is then. 
ready for use. 
Lime Sulphur and Flour Paste— 
5 lb. flour. 
2 pints lime sulphur (specific gravity = 1°3). 
100 gallons water. 
For 23 gallons of spray the following amounts are 
necessary : 
2 ounces flour. 
1 fluid ounce lime sulphur (specific gravity = 1:3). 
23 gallons water. 
Two and a half gallons of spray are prepared in the 
following manner: Two ounces of flour are mixed and 
boiled in 3 pints of water in the manner described above, 
and added to 17 pints of water in a bucket. One fluid 
ounce of lime sulphur, the specific gravity of which is 1°3, 
is then added to the liquid in the bucket and thoroughly 
stirred. 
The spray compounds described above constitute the 
most important fungicides in general use. They have 
been widely used and their value has been proved 
repeatedly. Other spray compounds have been devised 
for special purposes, but as they have not proved of 
