The inclusion of information of the sort is, however, quite essential, as it is by no means easily accessible, and, as a matter of fact, scarcely exists, except in the form of the official records of the various meteorological observatories, so that when collecting data for the compilation of this second part, or appendix, on tropical climates, the writer was a good deal surprised to find that he was engaged in the preparation of what is really a pioneer work on the subject in the English language. This being the case, it has been thought well to publish these outlines of tropical climatology also in a separate form for the use of the professional reader who may not care to be burdened with a booklet on health treated from the popular point of view; a step which has further necessitated that the paging and indexing of the two parts should be kept separate from each other, a plan which, in view of the moderate dimensions of the book, might otherwise have appeared rather superfluous. LIST OF DRUGS, &c., MENTIONED IN THE TEXT. _Bicarbonate of soda._ _Bismuthi salicyl._, in tabuloids of grains x. each. _Book of litmus_ paper. _Boracic acid_, in powder. _Calomel_, in tabuloids of ¹⁄₂ grain each. _Carbolic acid_, with sufficient glycerine added to keep it in a fluid condition. _Castor oil._ _Castor oil with resorcin_:-- ℞ Ol. ricini ℥viii. Resorcin ʒii. Mix, and dissolve the resorcin by standing the bottle in hot water. _Citrate of potash._ _Easton’s syrup_, put up in a bottle marked to its dosage. _Ether sulphuric._ This drug is too volatile for storage in the ordinary way in the Tropics and so should be put up in glass capsules each holding a drachm. _“Fever” or diaphoretic mixture_:-- ℞ Liq. ammon. acetatis fortior, B.P., 1885 ʒss. Sp. eth. nitrosi ♏xx. Potas. nitratis gr. i. Water to ʒii for each dose. Dose.--To be put up in a bottle graduated to that dosage containing 8 oz. of the mixture, and taken diluted with four or five times its quantity of water. _Goa ointment_:-- Goa powder } āā ʒss. Acid salicylic } Lanolin ad ℥i. _Gregory’s powder._ _Hydrochloric acid_, preferably in the dilute form. _Opium_, in tabuloids of 1 grain each. The “Patna” drug is preferable as a sedative before the administration of ipecacuanha. _Paint for “Dhobi’s itch”_:-- Liquor iodi fortior } Pure carbolic acid } _partes æquales ad_ ℥ii. Glycerine } _Perchloride of mercury_, in tabuloids:-- ¹⁄₄₀ grain } for internal administration. ¹⁄₆₄ grain } 2¹⁄₂ grain “soloids” for compounding an antiseptic solution. _Permanganate of potash_, put up in packets of 2 oz. each, wrapped in waterproof paper, for disinfecting wells. _Phenacetin_; tabuloids of grains v. each. _Phenyle_, “Little’s soluble.”