1. Sir Wm. Burnett's Patent Solution. It is made by dissolving zinc in commercial hydrochloric acid to saturation.

2. Ellerman's Deodorizing Fluid. This consists chiefly of perchlorides and chlorides of iron and manganese. In a report addressed to the Metropolitan Board of Works in 1859, Drs. Hoffman and Frankland stated that the per-chloride of iron was the cheapest and most efficient deodorizer that could be applied to sewage: 1/2 gallon deodorized 7500 gallons of sewage. 1 bushel of lime, or 3 lbs. of chloride of lime, would do the same.

3. Ledoyen's Solution. This is a solution of nitrate of lead, and contains about 20 oz. of the salt in a gallon. The specific gravity should be 1.40. A similar compound may be made by mixing 13 1/2 oz., of litharge with 6 pints of water, and adding 12 oz. of nitric acid at 1'38 specific gravity (or 8 oz. at 1.50); and digesting at a gentle heat till the solution is complete.

4. Suret's Compound. Sulphate of iron 20 lbs., sulphate of zinc 3 1/2 lbs., wood or peat charcoal 1 lb., sulphate of lime 26 1/2 lbs.; mix, and form into balls. To be placed in cesspools, etc, to deodorize them. M. Siret has subsequently modified this compound, thus: Sulphate of iron 100 parts, sulphate of zinc 50, tan or oak-bark powder 40, tar 5, and oil 5 parts.

5. Collins' Disinfecting Powder. Mix 2 parts of dry chloride of lime with 1 of burnt alum. To be set in shallow dishes in rooms, etc, with or without the addition of water.

6. Calyert's Powder. Carbolic acid (20 to 30 per cent.), alumina, and silica.

7. M'Dougal's Powder. Carbolate of lime 33 parts, sulphate of magnesia 59 parts, water 8 parts. These powders can be sprinkled about a room, thrown on sewage, or dissolved in water and so applied.

8. Sanitas. The efficacy of this disinfectant depends, we believe, upon its property of evolving peroxide of hydrogen and camphoric acid.

9. Condy's Disinfecting Fluids. See back.

10. [See also Chloride of Lime, Chloride of Soda, Acid Salicylic, Chloralum, further back. Peat charcoal also possesses powerful deodorizing properties.]