In The Luck of Roaring Camp every one will remember the expression of one of Bret Harte's mining ruffians after lie had passed through the shanty containing the newly born "Luck" and the corpse of the wretched mother. "He wrastled with my finger" said Mr. Kentuck, regarding that member with curiosity, and characteristically adding some adjectives more emphatic than to the point. On reading the story aloud in company several years ago a discussion arose as to whether the novelist was as correct an observer of infant human nature as he doubtless was of the vagaries of the pious cut-throats and chaste courtesans of the Pacific slope in the golden days of '49, and considerable doubt was thrown on the statement of Mr. Kentuck, since it did not seem probable that so gelatinous and flabby a creature as a newborn babe could "wrastle" (and prevail) even with a finger. Subsequent observation proved that the novelist here did not go beyond Nature's warrant, and that, whatever doubts we may have of the disinterestedness of Mr. Oakhurst, or the constancy of "Miggles," "The Luck" was drawn true to type.
Finding myself placed in a position in which material was abundant, and available for reasonable experiment, I commenced a series of systematic observations with the purpose of finding out what proportion of young infants had a noticeable power of grip, and what was the extent of the power. I have now records of upward of sixty cases in which the children were under a month old, and in at least half of these the experiment was tried within an hour of birth. The results as given below are, as I have already indicated, both curious and unexpected.
In every instance, with only two exceptions, the child was able to hang on to the finger or a small stick three quarters of an inch in diameter by its hands, like an acrobat from a horizontal bar, and sustain the whole weight of its body for at least ten seconds. In twelve cases, in infants under an hour old, half a minute passed before the grasp relaxed, and in three or four nearly a minute. When about four days old I found that the strength had increased, and that nearly all, when tried at this age, could sustain their weight for half a minute. At about a fortnight or three weeks after birth the faculty appeared to have maintained its maximum, for several at this period succeeded in hanging for over a minute and a half, two for just over two minutes, and one infant of three weeks old for two minutes thirty-five seconds! As, however, in a well-nourished child there is usually a rapid accumulation of fat after the first fortnight, the apparently diminished strength subsequently may result partly from the increased disproportion of the weight of the body and the muscular strength of the arms, and partly from the neglect to cultivate this curious endowment. In one instance, in which the performer had less than one hour's
