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Página 214 - LIVINGSTONE'S SOUTH AFRICA. Missionary Travels and Researches in South Africa ; including a Sketch of Sixteen Years' Residence in the Interior of Africa, and a Journey from the Cape of Good Hope to Loando on the West Coast ; thence across the Continent, down the River Zambesi, to, the Eastern Ocean.
Página 215 - A TREATISE ON THE DISEASES OF THE OX ; being a Manual of Bovine Pathology.
Página 215 - A MANUAL OF THE INFUSORIA. Including a Description of the Flagellate, Ciliate, and Tentaculiferous Protozoa, British and Foreign, and an account of the Organization and Affinities of the Sponges.
Página 34 - Muell. Arg., is recognized as the standard for grading rubber commercially. It will be noted that the method before mentioned is one requiring skill, judgment, and the expenditure of considerable labor. In most rubber countries the native collectors possess none of these requisites and are content to employ the crudest methods. In consequence, the rubber obtained is of a low grade, even though the species of tree is of the best. The Philippine rubber collectors are Samal and Joloano Moros living...
Página 13 - color" of the guttas undoubtedly comes from the bark of the tree when cut to secure the gutta-percha, for, by repeated solution and precipitation, the color may be almost entirely eliminated, leaving the gutta only slightly tinted from a cream color to light pink, and pure white when finely divided. It is my opinion that all variations of color are only incidental and not connected with the chemical structure of the gutta itself. The amount of color in the above samples was...
Página 73 - With regard to these he writes as follows : At a later date, during the latter half of the hot season and the rains of 1893, further experiments with the same end in view were carried out in Bombay, where the climate is favorable from its humidity and the disease is enzootic. From these positive results were obtained, the incubation period occupying four months (about June to September) ; but the incubation period of the disease will probably be found to vary with the amount of moisture in the atmosphere...
Página 12 - As a surer method of stopping the destruction, a second law was passed which prohibited the exportation of guttapercha from coast towns in the Federated Malay States in which the English could, of course, exercise personal supervision. The result was that the exportation from those places ceased promptly, but the felling of trees did not stop, the export simply traveling northward by overland routes until it was outside of English jurisdiction, and from there it was shipped to Singapore. I can not...
Página 34 - ... preparation of Para rubber, consists in subjecting thin layers of the milk, placed on the broad end of a paddle, to the coagulating action of smoke produced by burning certain husks which are similar to those of cocoanuts. The smoke contains creosote and acid fumes, which quickly destroy all fungus growths and bacteria which might tend to cause decomposition of the rubber, while the heat removes the greater part of the moisture at the same time. A chemical analysis of many grades of rubber coming...
Página 142 - In dogs muscular wasting is well marked, the animal being often reduced to a skeleton, but the fatty tissues are generally not much affected, except at the base of the heart, where the fat may undergo oedematous degeneration.

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