Abstract
OBSERVING the remarks of Mr. G. Henslow (NATURE, vol. xix. p. 433) in reference to “abstract reasoning” as not to be observed in the lower animals, it has occurred to me that the following facts may have a useful bearing on this subject:—My sister, who lives just opposite to my own house, possesses a cat (now about thirteen years old) whose intelligence is very remarkable. He has the habit of making use of the knocker of a side door, which is just within his reach as he stands on his hind legs, whenever he desires admission. A single knock is tried in the first instance, but if this is not answered promptly it is followed by what is known as a “postman's knock;” if this is not successful, trial is then made of a scientific “rat-tat” that would not disgrace a west-end footman. I should say that “Minnie” holds the knocker in his paw as we should hold it in our fingers, and not by simply tipping it up. How far this practice involves “abstract reasoning” I will not say, but something like an approach to it is suggested, for he was never taught to knock at the door, and adopted the habit some three years ago, evidently to gain admittance, very often to the annoyance of my sister's family, who have occasionally been disturbed in this way at un seemly hours. I should be sorry in thus referring to the sagacity of poor pussy (who is now also somewhat feeble) to reflect upon him by noticing some other of his peculiarities, one of which is his fondness for a little brandy and water and other alcoholic stimulants; but I think what I have referred to may be interesting to Mr. Henslow or some other of your correspondents, and it is within my own knowledge and observation.
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M., G. [Letters to Editor]. Nature 19, 459 (1879). https://doi.org/10.1038/019459b0
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DOI: https://doi.org/10.1038/019459b0
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