And while it is not less familiar in the West Indies, and in Dominica particularly, that dogs suffer from a mortal fever in the same seasons and periods as the people, the epidemic always breaking out in them first, I have the most unexceptionable medical evidence of the occurrence of a regular and well-marked tertian in a dog; that evidence consisting in the concurring decision of many surgeons, by whom the case was [p060] frequently examined, during a very long period. But it is time to terminate a paper, which, if it is but a sketch of an important subject, will at least convey to those to whom malaria has not hitherto been an object of attention, a general notion of the leading particulars which appertain to its natural history. J. M. _Elements of Chemistry, including the recent Discoveries and Doctrines of the Science. By_ Edward Turner, M.D., F.R.S.E., &c., &c. _Edinburgh_, 1827. This is a closely-printed octavo of 700 pages, and presents us with something more original, clear, and accurate than we have lately met with in modern chemistry. It comprehends a perspicuous view of the present state of chemical science; and, as far as its limits admit, the theoretical parts are, with some exceptions, well and distinctly worked out; nor are the practical details of manipulation neglected, though they evidently occupy a secondary place in our author’s estimation. To the arrangement we must at once decidedly object—it is indeed evident that Dr. Turner has pitched upon Dr. Thomas Thomson as his _magnus Apollo_, and here and elsewhere the book is tainted accordingly. This work is divided into four principal parts;—the first relates to what Dr. Turner, following his prototype, Dr. Thomson, calls _imponderables_, and a definition of them follows, which leads us to suggest the term _inexpressibles_, as equally appropriate. But, waiving this objection, the details relating to them are well and clearly given. Thus, after some prefatory remarks upon the subject of caloric or heat, (we prefer the latter term, and cannot allow its ambiguity,) its modes of communication are considered, first, as being _conducted_ through bodies, and then as _radiating_ through free space. In regard to the theories affecting the latter, our author wisely, as we think, prefers that of Prevost to that of Pictet. The _effects_ of heat are next discussed, such as _expansion_, including an account of the thermometer, and of the relative capacities of bodies for heat; _liquefaction_, _vaporisation_, _ebullition_, _evaporation_, and the _constitution of gases_ and lastly, the sources of heat are mentioned, but the details are referred to other parts of the work. [p061] _Light_ is next treated of, but we think too hastily, and too much in the abstract.