Balneum Formicum Effervescens, B.P.C. Effervescent Formic Bath.

Format explanation

Concentrated Formic Acid (80 per cent.) 0.25 | 12 ½ fl. ounces
Sodium Bicarbonate, in powder 0.40 | 20 ounces
Water at 30° to 35° ... to 100.00 | to 30 gallons

Add the formic acid to the water and immerse the sodium bicarbonate, previously enclosed in two calico bags.

The British Pharmaceutical Codex, 1911, was published by direction of the Council of the Pharmaceutical Society of Great Britain.