The Mission to Siam, and Hué the Capital of Cochin China, in the Years 1821-2. Finlayson George

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Ærides. Scapo simplici, foliis a radice arcte imbricatis, distichis tripedalibus, frondi similibus; foliolis ensiformibus, longissimis: floribus spicatis, alternis punctatis, magnis, speciosis; labello subcylindrico, tripartito, laminâ inferiore patente, trifida, acuminata integra, laminis superioribus in arcum supra pistillum conniventibus.

The flowers diffuse the richest fragrance, the petals are waved on the margin, of a fleshy consistence, of a dark yellow colour, interspersed with iron-brown spots. The pistillum is similarly dotted; the labellum internally striated, trifid, and villous at the apex. The spike of the plant discovered contained more than one hundred flowers, the greater number of them fully expanded, each several inches in length, and as much in breadth. —Extract from Mr. Finlayson’s Botanical Journal.

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Dr. Francis Hamilton has noticed several instances of what may be called peat formations. —Buch. MS.

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Much stress has been laid on the apparent insalubrity of marshes of this sort; and it has been maintained that in many parts they are the chief, if not the sole, cause of the most fatal of intertropical diseases, remittent fever. Humboldt, in his Essay on New Spain, lays great stress on the effect produced by the growth of Rhizophora Mangle, Pothos, Arum, and of the other plants which flourish in a marshy soil charged with saline particles, in the production of yellow fever. Without calling into question the insalubrity of marshy situations in general, there appears great reason to believe that we are still ignorant of the actual causes of this frightful disease. The settlement of Singapore is possessed in an eminent degree of the circumstances which are thought to be most conducive in producing the disease. Yet here it is as yet unknown. An intertropical climate on the margin of the sea, a continually high temperature, rapid and intense evaporation, a humid and extensive series of saline and fresh water marshes exposed to a burning sun, the vegetative impulse in a degree of activity unequalled perhaps in any other part of the globe, the occasional suspension of herbaceous vegetation by long-continued heat, accompanied by drought, profusion of vegetable matter, as leaves, felled wood, fruits, &c., intermixed with animal matter, forming fomites in every stage of the putrefactive process, are amongst the more conspicuous of the causes to which the occurrence of this disease is usually attributed; and here all the causes enumerated operate with tenfold force.

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See Raffles, in Asiatic Researches. Vol. XII.