What first measures does the text describe for a snakebite on a hand or foot?

Detailed answer

Where the bite cannot be tied off, the place is cut and burnt with fire, or the poison is sucked out with the mouth filled with earth. A footnote explains that tying keeps the poison from spreading because poison spreads through the blood; the text then adds venesection near the bite or, if the poison has spread, at the hands, feet or forehead. These are procedures for a trained practitioner.