phosphoric acid stands next to potassium in abundance and importance, constituting, on an average, about one-third of the entire ash.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson
The air was filled with fire-flies, which, emitting a phosphoric light something similar to the light of the glow-worm, only more red and brilliant, danced around me like sparks from a smith's anvil when he is beating a bar of red-hot iron.
"The Campaigns of the British Army at Washington and New Orleans 1814-1815"
G. R. Gleig
A good formula for such a general purpose fertilizer is 4 to 5 per cent nitrogen, 7 to 9 per cent phosphoric acid and 7 to 10 per cent potash to the ton.
"A Living from the Land"
William B. Duryee