Science SketchesA. C. McClurg, 1887 - 276 páginas |
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Términos y frases comunes
Agassiz American anadromous animals basin blue-back bottom brook-trout brooks caudal fin charr COAST OF CALIFORNIA color Columbia Coregonus course Cuba curriculum Darters Darwin degree DESCRIPTION dorsal fin Etheostoma Europe existence fact fauna Favosites fins fishes FISHES COLLECTED forms fresh waters fresh-water fishes genera genus glacier grayling head Indiana inhabit John the Baptist Johnny Darters Jordan and Gilbert known Lake Lake Michigan lateral line less Linnæus LIST OF FISHES males marine Matterhorn mouth Museum naturalists Nature nomenclature North America northern Notropis number of species Oncorhynchus origin ornithologists pounds Proc quinnat Rafinesque rainbow trout range reached regard regions rivers rocks rope Salmo mykiss Salmo salar salmon Salmonida Salvelinus scientific side silvery snow SPECIES OF FISHES specimens spots spring stone streams student teeth things tion trout U. S. Nat vomer Walbaum white-fish Zermatt
Pasajes populares
Página 193 - There is grandeur in this view of life, with its several powers, having been originally breathed by the Creator into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being evolved.
Página 193 - To my mind it accords better with what we know of the laws impressed on matter by the Creator, that the production and extinction of the past and present inhabitants of the world should have been due to secondary causes, like those determining the birth and death of the individual.
Página 174 - On my return home, it occurred to me, in 1837, that something might perhaps be made out on this question by patiently accumulating and reflecting on all sorts of facts which could possibly have any bearing on it. After five years' work I allowed myself to speculate on the subject, and drew up some short notes...
Página 174 - After five years' work I allowed myself to speculate on the subject, and drew up some short notes ; these I enlarged in 1844 into a sketch of the conclusions, which then seemed to me probable : from that period to the present day I have steadily pursued the same object. I hope that I may be excused for entering on these personal details, as I give them to show that I have not been hasty in coming to a decision.
Página 193 - When I view all beings not as special creations, but as the lineal descendants of some few beings which lived long before the first bed of the Cambrian system was deposited, they seem to me to become ennobled.
Página 178 - A struggle for existence inevitably follows from the high rate at which all organic beings tend to increase. Every being, which during its natural lifetime produces several eggs or seeds, must suffer destruction during some period of its life, and during some season or occasional year, otherwise, on the principle of geometrical increase, its numbers would quickly become so inordinately great that no country could support the product.
Página 26 - No life, my honest scholar, no life so happy and so pleasant as the life of a well-governed angler; for when the lawyer is swallowed up with business, and the statesman is preventing or contriving plots, then we sit on cowslip banks, hear the birds sing, and possess ourselves in as much quietness as these silent silver streams, which we now see glide so quietly by us.
Página 12 - By and by the water began to change. It grew denser, and no longer flowed rapidly along; and twice a day it used to turn about and flow the other way. Then the shores disappeared, and the water began to have a different and peculiar flavor — a flavor which seemed to the salmon much richer and more inspiring than the glacier water of their native Cowlitz.
Página 173 - ... that mystery of mysteries, as it has been called by one of our greatest philosophers.
Página 18 - ... chin, each had to turn aside to let the other pass. His beautiful teeth grew longer and longer, and projected from his mouth, giving him a savage and wolfish appearance, quite at variance with his real disposition. For all the desires and ambitions of his nature had become centred into one.