Formula for Use of Sodium Sulphite in the Field.
(a) Dissolve anhydrous sodium sulphite in water at the rate of 1 pound to 3 gallons.
(b) Of this solution each coolie is given about 3⁄4 pint. This is usually sufficient for a task of 350 trees. The solution is used by shaking a few drops into the cup or, diluted with an equal volume of water, it is run down the main channel when the latex flows.
1. Showing Effect of “Wintering.”
On some estates it is found either unnecessary or impracticable to use the solution in this manner. Instead the anti-coagulant is placed in the bottom of the bucket prior to the commencement of collection. The solution is made as in (a) above, and roughly half an ordinary latex-cupful is placed in each bucket.
2. New Growth of Young Leaf on Same Tree.