Several plans have been advised from time to time; some are costly, and some require too great attention to details, and are therefore impracticable for general employment. The following are those in more common use:-- The _gelatin dressing_, as originally ordered, is made by melting over a water-bath one part of gelatin in two parts of water--quickly painting it over the diseased area; it dries rapidly, and to prevent cracking glycerine is brushed over the surface. Or the glycerine may be incorporated with the gelatin and water in the following proportion: glycerine, one part; gelatin, four parts, and water eight parts. Medicinal substances may be incorporated with the gelatin mixture. A good formula is the following:-- [Rx] Gelatin, ............................. [Oz]j Zinci oxidi, ......................... [Oz]ss Glycerini, ........................... [Oz]iss Aquae, ................................ [Oz]ii-[Oz]iij. This should be prepared over a water-bath, and two per cent. ichthyol added. A thin gauze bandage can be applied to the parts over which this dressing is painted, before it is completely dry; it makes a comfortable fixed dressing and may remain on several days. _Plaster-mull_ and _gutta-percha plaster_. The plaster-mull, consisting of muslin incorporated with a layer of stiff ointment, and the gutta-percha plaster, consisting of muslin faced with a thin layer of India-rubber, the medication being spread upon the rubber coating. _Rubber plasters._ These are medicated with the various drugs used in the external treatment of skin diseases, and are often of service in chronic patches. Two new excipients for fixed dressings have recently been introduced--bassorin and plasment; the former is made from gum tragacanth, and the latter from Irish moss. The following is a satisfactory formula for a tragacanth dressing: [Rx] Tragacanth, .......................... gr. lxxv Glycerini, ........................... [minim] xxx Ac. carbolici, ....................... gr. x-xx Zinci oxidi, ......................... [dram]iss-[dram]iiss. M. This is painted over the parts and allowed to dry, and a mild dusting powder sprinkled over. It cannot be used in warm weather or in folds, as it is apt to get sticky. The following is a bassorin paste which may be variously medicated. [Rx] Bassorin, ............................ [dram]x Dextrin, ............................. [dram]vj Glycerini, ........................... [Oz]ij. Aquae, ....................... q.s. ad. [Oz]iij. It should be prepared cold. Another "drying dressing" which may be used in cool weather is: [Rx] Zinci oxidi, ......................... [Oz]j Glycerini, ........................... [Oz]ss Mucilag. acaciae, ..................... [Oz]ii-[Oz]iv. It may be variously medicated.