7. 2 per cent. solution of creolin or lysol; 8. U.S.P. lead and opium wash; 9. aqueous solution of ichthyol (varying from 5 to 50 per cent. according to the indications); 10. black wash (made by dissolving 64 grains of calomel in a pint of lime water—this solution only being used in luetic cases). 11. white wash (prepared by mixing zinc oxide, 2 drams, solution of subacetate of lead, 3 drams, glycerine, 4 ounces and lime water, 4 ounces); 12. Dakin’s solution (hypochlorite of soda), prepared as follows: chlorinated lime (bleaching powder) 200 gm. sodium carbonate,dry 100 gm. sodium bicarbonate 80 gm. Put the chlorinated lime in a 12 litre flask with 5 litres of ordinary water and let stand over night. Dissolve the sodium carbonate and bicarbonate in 5 litres of cold water; then pour this into the flask and shake it vigorously for a minute and let it stand to permit the calcium carbonate to settle. After half an hour, siphon off the clear liquid and filter it to obtain a perfectly limpid product. The antiseptic solution is then ready for surgical use: it contains about 0.5 gm. per cent. of sodium hypochlorite with small amounts of neutral salts. It is practically isotonic with blood serum. Never heat the solution, and always keep it from the light. If in an emergency it is necessary to triturate the chlorinated lime in a mortar, do so only with water, never with the solution of the soda salts. This solution has been used extensively abroad in the treatment of infections and wounds and has given splendid results. (A proper quantity of Dakin’s solution for office purposes would be about one-tenth of the prescription above given.) +DUSTING POWDERS+ These are employed either as antiseptics or as astringents or for both purposes. Their use is limited, and they are employed only where the secretion is scanty. Among the various powders used are: aristol, dermatol, boric acid, orthoform, calomel, protonuclein, zinc oxide, alum, scarlet red, etc. _Thymoliodide_, or _aristol_, is a splendid antiseptic powder and enjoys the advantage over iodoform of being inodorous. _Iodoform_ should only be used in tubercular conditions. _Dermatol_, or _bismuth subgallate_, combines the astringent and mildly antiseptic qualities of bismuth and gallic acid. _Boric acid_ is mildly antiseptic. _Calomel_ should only be used in syphilitic conditions. _Zinc oxide_ and _alum_ are both astringent. Scarlet red (5 per cent.) with boric acid (95 per cent.) is indicated for the stimulation of granulations. +Solutions.+ Among the various solutions used are silver nitrate, in various strengths, zinc and copper sulphate, ichthyol, balsam of Peru, nitric acid, sulphuric acid, trichlorand monochloracetic acid. _Silver nitrate_ is employed for its astringent action, as are also the _copper_ and _zinc sulphates_. Balsam of Peru is used for its stimulating action.