In the eighth chapter we have an explanation of the effects of climate and seasons in the production of malaria; and while we need not analyse the facts which it contains, we may introduce in lieu of this, the explanations which its statements afford as to that recent increase of the diseases of malaria which we noticed at the commencement of this article. The last few years have been distinguished for an [p107] uncommon prevalence of East winds, and to such a degree indeed, that we can find no meteorological records at all to be compared with the history of these years. And while the history of the intermittent and remittent, in London at least, from the time of Morton and Sydenham downwards, shows that all its periods of such diseases have been periods of East winds, it is not difficult to see how it acts as to both classes of marsh fever. To London, in particular, it is the best conductor, propagating the malaria from all the moist lands to the eastward. To the East coast, if our author’s theory is valid, it brings the malaria from Holland; and, moreover, as it forms our hottest summers, it causes our own climate to approximate more to the southern ones, and thus enables our lands to produce a greater quantity of malaria than in ordinary summers. To pass from the eighth chapter, the ninth is a partial sketch of the geography of malaria; a chapter for which the author apologises, but which is nevertheless a very interesting collection of facts on a subject where a volume is, doubtless, a desideratum. And it would require a volume; while, in spite of our author’s fears, we can really see no reason why such a statistical account of health should not be drawn up for England, when the utility of it is unquestionable. It is true that people cannot abandon their homes or change their residences, because their lots happen to be cast in an insalubrious country. But it is not less important to know what and where these dangers are; because, though the inhabitants may be compelled to abide, they can still correct much of the evil by the various modes pointed out, or avoid much of the hazard by resorting to the obvious precautions. To be ignorant, is to be exposed to the full evil: to know where it lies, is to know how and where to avoid it in numerous ways; since it will be found that by far the greater number of diseases occurring, were not necessary or unavoidable, but have been the result of ignorance as to the precise fact or spot which did produce the effect in question. And this we conceive to be the great use of the book before us; and that if ever it, or a code of rules founded on it, shall become popular, or form a _vade mecum_, particularly in the country, the effect will be to reduce most materially the quantity of disease, and very particularly that which is by far the most serious, the summer and autumnal fevers. On this around, we should be glad to see a geography of malaria for