Experimental Morphology: Effect of chemical and physical agents upon protoplasm, Volumen1Macmillan, 1896 - 280 páginas This was reprinted in 1908. |
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Términos y frases comunes
acclimatization acid action activity acts agents aggregation algæ amoeba animals anode Arch attraction attuned axis bacteria Bacterium Biol body cells chlorophyll cilia Ciliata compounds concentration contraction dark Death point determined diminished direction of locomotion ENGELMANN epistrophe Euglena excitation experiments f. d. ges flagellum frog geotaxis glass gradually gravity heat heat-rigor increased Infusoria intensity of light irritability kathode killed KÜHNE larva larvæ living LOEB LOEW MASSART maximum ment metabolism Metazoa migration minutes molecular molecules move movement muscle Myxomycetes normal observed occurs optimum organisms osmotic oxygen Paramecium Pelomyxa PFEFFER phenomena phenomenon photopathy phototactic phototaxis Physiol pigment placed plants plasma plasmodium poison position produced Protista protoplasm Protozoa pseudopodia rays reagent resistance period response rotifers salts solution species spectrum spermatozoa Spirillum Spirogyra spores stimulation studied subjected substances sunlight swarm-spores tardigrades temperature thigmotaxis tion trough tube Ueber vacuole varying VERWORN 89
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Página 217 - Recherches expérimentales sur les mouvements du pigment granuleux et des cellules pigmentaires sous l'influence de la lumière et de l'obscurité dans les yeux des Crustacés et des Arachnides, in: Arch.
Página 197 - Butterflies are attuned to a high intensity of light, moths to a low intensity; so that bright sunlight, which calls forth the one, causes the other to retreat. On the other hand, a light like that of a candle, so weak as not to stimulate a butterfly, produces a marked response in the moth.
Página 217 - La disposition histologique du pigment dans les yeux des Arthropodes sous l'influence de la lumiere directe et de l'obscurite complete.
Página 269 - Ueber den Einfluss der Wärme auf Länge und Dehnbarkeit des elastischen Gewebes und des quergestreiften Muskels.
Página 265 - Conferva abound in the warm stream from the springs, and two species, one ochreous brown, and the other green, occur on the margins of the tanks themselves, and in the hottest water; the brown is the best Salamander, and forms a belt in deeper water than the green; both appear in broad luxuriant strata, wherever the temp, is cooled down to 168°, and as low as 90°.
Página vi - ... not happen at all, we are engaged with a non-quantitative phenomenon, a matter of fact, not of degree ; but whenever a thing may be greater or less, or twice or thrice as great as another, whenever, in short, ratio enters even in the rudest manner, there science will have a quantitative character. There can be little doubt, indeed, that every science as it progresses will become gradually more and more quantitative. Numerical precision is the soul of science...
Página 180 - The wandering of organisms into a more or less intensely illuminated region, the direction of locomotion being determined by a difference in intensity of illumination of the two poles of the organism, is photopathy.
Página 263 - C. (126° to 140° F.) In the hotter springs the plants appeared to be of the simplest kind, apparently simple cells, of a bright green color; but they were examined only with a good pocket lens. In the water below, about 60-65 C., filamentous Conferva? formed considerable masses, of a very bright green color.
Página 108 - ... plants." Davenport (1897, page 108) gives an example drawn from the behavior of one of the organisms at present under consideration. " When an organism has been stimulated by contact for some time, it at last becomes changed, so that it no longer responds as it did at first. Thus, Dr. WE Castle informs me that he has seen a colony of Stentors, in an aquarium, being constantly struck by Tubifex waving back and forth, yet the Stentors did not contract as they usually do when struck.
Página 216 - ... Klassen und Ordnungen des Thier-reichs, Bd. 6, Abt. 2, 726 pp., 52 Taf. KRAUSE, W. '92. Die Retina. Monatschr. f. Anat. u. Physiol., Bd. 9, pp. 150-155, 157-236.