Philosophical Transactions of the Royal Society of London, Volumen127

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W. Bowyer and J. Nichols for Lockyer Davis, printer to the Royal Society, 1837
 

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Página 145 - Cubic inches. 2 38 2 43 5 11 11 2 47 4 20-5 14 was checked by including in the circuit a cell whose powers had not been exalted by the increased temperature which had been communicated to the others. At this period of my investigation some unexpected and highly interesting phenomena occurred, which turned out to be of a very complicated nature, and the unravelling of which cost me much time and labour. After careful consideration of the subject, I have come to the conclusion, that the clearest mode...
Página 363 - ... the terrier evinced, as soon as it perceived the scent of the polecat, very violent anger ; and as soon as it saw the polecat, attacked it with the same degree of fury as its parents would have done. The young spaniel, on the contrary, looked on with indifference ; but it pursued the first woodcock which it ever saw with joy and exultation, of which its companion, the terrier, did not in any degree partake.
Página 364 - ... night ; but I could not discover (as I think I should have done had this been the case) any traces of their having been there ; and as I could not do so, I was led to conclude that the young dogs were guided by feelings and propensities similar to those of their parents. The subjects of my observation in these cases were all the offspring of well-instructed parents, of five or six years old or more ; and I thought it not improbable that instinctive hereditary propensities might be stronger in...
Página 92 - ... 5. The upper surface of the brain of an Ursine Dasyure (Dasyurus ursinus, GEOFF.). 6. The upper surface of the brain of a Virginian Opossum (Didelphys Virginiana, SHAW). 7. The base of the brain of a Beaver. 8. The base of the brain of a Wombat. 9. The base of the brain of a Virginian Opossum. From these figures it will be seen that the convolution of the surface of the hemispheres of the brain does not take place in proportion as the hemispheres themselves are developed in superficial extent....
Página 98 - I conceive that the best if not the only method of investigating alterations in the height of the land above the water in any given locality where the water is influenced by the tides, will be to examine carefully whether any alteration has taken place in the values of the constants D and (E) for that place, the height of high water being of course always reckoned from some fixed mark in the land.
Página 364 - Woodcocks are driven in frosty weather, as is well known, to seek their food in springs and rills of unfrozen water, and I found that my old dogs knew about as well as I did the degree of frost which would drive the woodcocks to such places ; and this knowledge proved very troublesome to me, for I could not sufficiently restrain them. I therefore left the old experienced dogs at home, and took only the wholly inexperienced young dogs ; but to my astonishment, some of these, in several instances,...
Página 364 - I therefore left the old experienced dogs at home, and took only the wholly inexperienced young dogs ; but, to my astonishment, some of these, in several instances, confined themselves as closely to the unfrozen grounds as their parents would have done. When I first observed this, I suspected that woodcocks might have been upon the unfrozen ground during the preceding night, but I could not discover (as I think I should have done had this been the case) any traces of their having been there ; and...
Página 365 - I have witnessed within the period above mentioned, of nearly sixty years, a very great change in the habits of the woodcock. In the first part of that time, when it had recently arrived in the autumn, it was very tame ; it usually chuckled when disturbed, and took only a very short flight. It is now, and has been during many years, comparatively a very wild bird, which generally rises in silence and takes a comparatively long flight, excited, I conceive, by increased hereditary fear of man.
Página 409 - From a dozen to twenty cilia are concerned in the production of each apparent wave, the highest point of which is formed by a cilium extended to its full length, and the lowest point between every two waves by one folded down completely upon itself, the intervening space being completed by others in every degree of extension, so as to present something of the outline of a cone...
Página 366 - I do not think that it had ever done this more than three or four times. It walked very quietly behind my gamekeeper upon the opposite side of the river, and it looked on with apparent indifference whilst I killed a couple of mallards and a widgeon ; but it leaped into the river on the gamekeeper pointing out the birds to it, and it brought them on shore, and to the feet of the gamekeeper, just as well as the best instructed old dog could have done. I subsequently shot a snipe, which fell into the...

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