§ XXIX. The Juices of Herbs.

I have succeeded in preserving very well the juices of such plants as lettuce, chervil, borage (bourache), wild succory (chicorée sauvage), water-cresses (cresson de fontaine), &c. I prepared and purified them by the usual process, I corked them, &c. in order to give them one boiling in the water-bath.