The American Naturalist, Volumen30Essex Institute, 1896 |
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Página iv
... Association at Buffalo , 564 ; Priority of Publication , 651 ; Presidents of the American Asso- ciation , 652 ; The Decimal Catalogue System , 652 ; The Ameri- can Association , 805 ; The Field Museum , 806 ; Notice to Our Contributors ...
... Association at Buffalo , 564 ; Priority of Publication , 651 ; Presidents of the American Asso- ciation , 652 ; The Decimal Catalogue System , 652 ; The Ameri- can Association , 805 ; The Field Museum , 806 ; Notice to Our Contributors ...
Página vi
... Conifers of the Pacific Slope , 402 ; Pop- ular Botany , 404 ; Notes of Botanical Papers , 404 ; Botany in 933 941 the Natioual Education Association , 486 ; Coulter's Revision of vi [ Vol . XXX , The American Naturalist .
... Conifers of the Pacific Slope , 402 ; Pop- ular Botany , 404 ; Notes of Botanical Papers , 404 ; Botany in 933 941 the Natioual Education Association , 486 ; Coulter's Revision of vi [ Vol . XXX , The American Naturalist .
Página vii
the Natioual Education Association , 486 ; Coulter's Revision of the N. A. Cactaceæ , 486 ; Botanical News , 487 , 587 , 1045 ; Tild- en's American Algæ , 584 ; Sets of North American Plants , 585 ; Botany in Buffalo , 586 ; Blanks for ...
the Natioual Education Association , 486 ; Coulter's Revision of the N. A. Cactaceæ , 486 ; Botanical News , 487 , 587 , 1045 ; Tild- en's American Algæ , 584 ; Sets of North American Plants , 585 ; Botany in Buffalo , 586 ; Blanks for ...
Página ix
... Association , 156 ; The Cat's Fun- eral , 161 ; Consciousness and Evolution , 249 ; Professor Bald- win on Performation and Epigenesis , 341 ; Psychological Data Wanted , 345 ; Physical and Social Heredity , 422 ; Observations on ...
... Association , 156 ; The Cat's Fun- eral , 161 ; Consciousness and Evolution , 249 ; Professor Bald- win on Performation and Epigenesis , 341 ; Psychological Data Wanted , 345 ; Physical and Social Heredity , 422 ; Observations on ...
Página xi
... Association Advancement 493 Apoda ....... 149 Aptornis defossor ..... 746 E. D. Apyonops anomalus .... 1052 937 Archeological Discoveries at Caddington , England . H. 162 C. Mercer ...... 83 Architeuthis , New Species of ... 332 Sci ...
... Association Advancement 493 Apoda ....... 149 Aptornis defossor ..... 746 E. D. Apyonops anomalus .... 1052 937 Archeological Discoveries at Caddington , England . H. 162 C. Mercer ...... 83 Architeuthis , New Species of ... 332 Sci ...
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Página 911 - Its power of inducing fermentation in a solution of sugar was entirely destroyed, although no perceptible change in the appearance of the yeast cells could be detected under the microscope. This experiment was repeated several times, and always with the same result, although when the yeast was simply washed in water it readily induced fermentation.
Página 189 - Consequently, if the theory be true, it is indisputable that before the lowest Cambrian stratum was deposited, long periods elapsed, as long as, or probably far longer than, the whole interval from the Cambrian age to the present day; and that during these vast periods the world swarmed with living creatures.
Página 552 - Does the organism learn to make new adjustments, or to modify old ones, in accordance with the results of its own individual experience? If it does so, the fact cannot be due merely to reflex action in the sense above described, for it is impossible that heredity can have provided in advance for innovations upon, or alterations of, its machinery during the lifetime of a particular individual.
Página 431 - Their houses are mats or barks of trees, set on poles in the fashion of an English barn, but out of the power of the winds, for they are hardly higher than a man.
Página 169 - Illustrations of the dynamic metamorphism of anorthosites and related rocks in the Adirondacks...
Página 862 - Assistant Secretary of the Smithsonian Institution and Director of the National Museum, died in Washington, Sept.
Página 409 - Triarthrus. No traces of any special organs for this purpose have been found in this genus, and their former existence is very doubtful, especially in view of the perfection of details preserved in various parts of the animal. The delicacy of the appendages and ventral membrane of trilobites and their rarity of preservation are sufficient demonstration that these portions of the outer integument were of extreme thinness, and therefore perfectly capable of performing the function of respiration. Similar...
Página 544 - Naturalist. [July, ments) — but by the reinstatement of it by a discharge of the energies of the organism, concentrated as far as may be for the excessive stimulation of the organs (muscles, etc.) most nearly fitted by former habit to get this stimulation again (in which the " stimulation " stands for the condition favorable to adaptation).
Página 994 - We must therefore picture to ourselves a fertile plain occupying the whole of the Bristol Channel, and supporting herds of reindeer, horses, and bisons, many elephants and rhinoceroses, and now and then being traversed by a stray hippopotamus, which would afford abundant prey to the lions, bears, and hyaenas, inhabiting all the accessible caves, as well as to their great enemy and destroyer, man."* III.
Página 940 - In reviewing the results of these investigations and comparing one species with another, without losing sight of the fact that comparative good is not necessarily positive good, it appears that of 7 species considered the Downy Woodpecker is the most beneficial. This is due in part to the great number of insects it eats and in part to the nature of its vegetable food, which is of little value to man. Three-fourths of its food consists of insects, and few of these are useful kinds. Of grain, it eats...