The Journal of Science, and Annals of Astronomy, Biology, Geology, Industrial Arts, Manufactures, and Technology, Volumen15James Samuelson, Sir William Crookes J. Churchill and Sons., 1878 |
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Página 34
... LIGHT UPON THE COLOURATION OF THE ORGANIC WORLD . NTIL the earlier portion of the present century light , by the vast majority of civilised persons , was re- garded as a medium for the sense of sight , and as very little more . With the ...
... LIGHT UPON THE COLOURATION OF THE ORGANIC WORLD . NTIL the earlier portion of the present century light , by the vast majority of civilised persons , was re- garded as a medium for the sense of sight , and as very little more . With the ...
Página 35
... light , and hence the colours of animals may be divided into two well - marked classes . On the one hand , especially in birds and insects , we find hues which are iri- descent changeable according to the relative positions of the ...
... light , and hence the colours of animals may be divided into two well - marked classes . On the one hand , especially in birds and insects , we find hues which are iri- descent changeable according to the relative positions of the ...
Página 36
... light for some years , the jet - black Typhæus vulgaris - absurdly known as the " bull - comber " -has taken a decided chestnut - brown , whilst a similar change has come over the blue - black elytra of the common dung - beetle . To ...
... light for some years , the jet - black Typhæus vulgaris - absurdly known as the " bull - comber " -has taken a decided chestnut - brown , whilst a similar change has come over the blue - black elytra of the common dung - beetle . To ...
Página 38
... light , and fade the more rapidly in proportion to the intensity of the illumination to which they are exposed . Hence we are compelled to recognise light as a destroyer of animal colouration . But light is generally regarded not merely ...
... light , and fade the more rapidly in proportion to the intensity of the illumination to which they are exposed . Hence we are compelled to recognise light as a destroyer of animal colouration . But light is generally regarded not merely ...
Página 39
... light of low latitudes is a prominent factor in the production of splendid colours . Were such the case gaily - coloured species in our climate would not merely be fewer and smaller ; they would rather be altogether wanting . Again ...
... light of low latitudes is a prominent factor in the production of splendid colours . Were such the case gaily - coloured species in our climate would not merely be fewer and smaller ; they would rather be altogether wanting . Again ...
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action ammonia animals antennæ appear atmosphere atomic atomic weights become beds birds Boulder-clay Brentford carbonic acid cause cent chemical china clay clay colour compound condition contains deposits diluvium Ealing effect electric energy Europe evaporation evidence existence experience explained fact fauna feeling feet Finchley Geological glacial glaciers gravel gravific heat hypothesis inch insects lake larvæ less light liquid London London Clay lower matter means microscope moisture molecules motion natural nitrogen object observed obtained occur organic original palæolithic paper particles pebbles pedesis pedetic phenomena physical placer mines portion present probably produced Prof proper motion quantity Raoul Pictet recognised remarkable river rocks Sands and Gravels sandy Science scientific sense species stones substances sulphuric acid supposed surface temperature Thames theory tion trance tube valley vapour vibration wave whilst woolly rhinoceros
Pasajes populares
Página 233 - So that in strict truth the ideas of sight, when we apprehend by them distance and things placed at a distance, do not suggest or mark out to us things actually existing at a distance...
Página 553 - LIGHT: a Series of Simple, entertaining, and Inexpensive Experiments in the Phenomena of Light, for the Use of. Students of every age.
Página 268 - Other Worlds than Ours ; The Plurality of Worlds Studied under the Light of Recent Scientific Researches.
Página 432 - Here are two large houses three or four hundred feet in length, and about one hundred and fifty feet wide at the base. They are situated upon opposite sides of a small creek, and in ancient times are said to have been conceded with a bridge.
Página 564 - Sanitary Engineering: a Guide to the Construction of Works of Sewerage and House Drainage, with Tables for facilitating the calculations of the Engineer. By BALDWIN LATHAM, CE, M. Inst. CE, FGS, FMS, Past-President of the Society of Engineers.
Página 424 - ... for Evocations. Containing the Theoretic Teachings of Spirits concerning all kinds of Manifestations, the Means of Communication with the Invisible World, the Development of Medianimity, &c.
Página 504 - ... explanation of the strange stratification which the voltaic discharge undergoes in rarefied gases, it is clear that the alternate disposition of light and darkness must be dependent on some periodic distribution in space or sequence in time which can at present be dealt with only in a very general w&y.
Página 511 - Next as to mechanical appliances. Mr. Babbage, when speaking of the difficulty of ensuring accuracy in the long numerical calculations of theoretical astronomy, remarked, that the science which in itself is the most accurate and certain of all had, through these difficulties, become inaccurate and uncertain in sume of its results.
Página 501 - Moliere's well-known character, been talking mathematics without knowing it. It is, moreover, a fact not to be overlooked that the appearance of isolation, so conspicuous in mathematics, appertains in a greater or less degree to all other sciences, and perhaps also to all pursuits in life. In its highest flight each soars to a distance from its fellows. Each is pursued alone for its own sake, and without reference to its connection with, or its application to, any other subject. The pioneer and the...
Página 432 - ... a bridge. They are five and six stories high, each story receding from the one below it, and thus forming a structure terraced from top to bottom. Each story is divided into numerous little compartments, the outer...