Note 9 — XIV. METHODS OF CULTIVATION.
Reading edition
If compressed tablets of pyrogallic acid cannot be obtained make up a stock "acid pyro" solution
Pyrogallic acid, 10 grammes Hydrochloric acid, 1.5 c.c. Distilled water, 100 c.c.
and at step 4, run in 10 c.c. of the solution.