B. Pruritus, tumefaction, vesicles, pustules, crusts, 45, 1: 106. Erythema, vesicles, etc.; (H.G.P.).

D. Hemorrhoids, 20, 102. Eczema; (H.G.P.).

Remarks

The effects of rhus venenata or swamp sumach closely resemble those of rhus toxicodendron, except that the former is generally believed to be the more potent. My clinical experience is confined to a tincture prepared by Dr. Wm. Manlius Smith, of Syracuse, in 1847. This tincture is still active, as only last year a few drops applied to the arm of a medical friend excited an active dermatitis. Applied to my own skin it produces no effect. I have used this tincture externally in eczema in the following manner: the patient is furnished with the tincture diluted with five or ten parts of alcohol, and directed to add a few drops to a wineglassful of water, and apply the lotion to the affected part. If no beneficial effect, nor undue reaction is experienced, he is directed to increase the proportion of the drug at the next application, and so on, until an effect is produced. I have used it thus far only in chronic and pru-riginous eczematous patches, accompanied with very slight infiltration. In these it has acted admirably. It may be stated incidentally that the Rhus diversiloba of the Pacific coast is said to be even more active than our eastern varieties. The Rhus glabrum, on the other hand, does not appear to possess the peculiar venomous qualities of the other species. I do not think it wise to order Rhus tox. or Rhus ven. in prescription, but invariably dispense it myself. Those who see fit to do otherwise may be reminded that the genitive of Rhus is Rhois or Roris (Gerrish*).

* Prescription Writing. Portland, 1878, p. 47.

Ribes Rubrum, L., F

C. Dartres, prurigo, and other chronic affections, accompanied with general irritation, 48, 4: 81.