Medicated soaps, first investigated scientifically by Unna of Hamburg in 1886, contain certain substances which exercise a specific influence on the skin.
A few medicated soaps are prepared for internal use, among which are croton soap and jalap soap, both gentler cathartics than the uncompounded medicinal principles.
Medicated soaps for external use are only employed in cases of skin ailments, as prophylactic washes and as disinfectant soaps.
Medicated soaps are made by adding the drug to either hard soap or curd soap in the desired proportions.
Trees must be fixed to the walls and buildings against which they are trained by means of nails and shreds (neat medicated strips are now sold for this purpose), or in cases where it is desired to preserve the wall surface intact, by permanent nails or studs driven in in regular order.
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