ZOOLOGY. 355 



arrives, after sixty-seven experiments, is, that the secretion in each 

 breast every two hours is from one and a half to two ounces. He 

 met with one instance in which the quantity amounted to nearly three 

 pounds in twenty-four hours. 



RESEMBLANCE BETWEEN THE FACES OF MEN AND ANIMALS. 



AT the meeting of the American Association, in August, Prof. 

 Agassiz made an oral communication on the comparisons which may 

 be drawn between the faces of men and those of fishes and other Ver- 

 tebrata ; the main points stated are embraced in the following abstract : 

 We hear frequent remarks in regard to the resemblance existing 

 between the human face and the appearance of different families of 

 animals. People are sometimes impressed with recollections of some 

 friend by looking at pictures of animals. But as soon as we ask in 

 what the resemblance consists, we are at a loss for an answer. By 

 observing different races of mankind, he had been led to investigate 

 these appearances, together with the differences existing in the human 

 race. The unity of structure existing between all classes of Verte- 

 brata is proof positive of a resemblance between individuals of this 

 great class. From the lowest type of vertebrates up to man, one 

 common structure of frame may be traced, and especially do we find 

 such common structure of the face in general. The question is to 

 determine the gradation of species, and the moral and physical 

 superiority of individuals. He opposed Camper's theory of the facial 

 angle, showing its failure to explain the various differences which ex- 

 ist. The effect of many of its principles, indeed, would place some 

 families of animals above tho human race. The Professor also traced, 

 by diagrams, the resemblance between the bones of people in old age 

 and the folds of the jaws in fishes. Whiskers and mustachios on 

 mankind he considered as very closely related to the hairs on the face 

 of the monkeys. He urged the importance of accurate portraits of 

 monkeys, and other animals, akin to mankind, in order better to de- 

 termine the relative position of the parts, and the connections which 

 exist between individual beings. In conclusion, he showed that, by 

 extending the line of ths human features, a resemblance may be at 

 once traced to different individuals of the animal kindom. 



INCREASE OF THE NAIL AND THE HAIR IK 



THE growth of the nails is more rapid in children ib^ in adults, 

 and slowest in the aged. It goes on more promptly L, summer than 

 in winter, so that the same nail which is renevsd in 13:3 days in win- 

 ter requires only 11G in summer, a fact depending on the vis 

 vitalis, which seems to be proportional to it. The increase for the 

 nails of the right hand is more rapid than for the left; moreover, it 

 differs for the different fingers, and in order corresponding with the 

 length of the finger ; consequently, it is most rapid for the middle fin- 

 ger, nearly equal for the two either side of this, slower for the little 

 ringer, and slowest for the thumb. For the middle finger of the right 



