MIRACLES OF SCIENCE 



a cat, for example, has some quality of felineness that 

 distinguishes it from a cell of any other species of 

 animal extends its mysterious influence so compre- 

 hensively that it includes not merely every fibre of 

 the organism but every drop of blood in an animal's 

 body. 



The proof of this has been given in a remarkable 

 series of experiments conducted by Professor G. H. 

 F. Nuttall, the American biologist, now of the Uni- 

 versity of Cambridge. 



Professor Nuttall has developed a system of bloo'di 

 testing of such delicacy as quite to transcend the 

 bounds of microscopic examination or of any chemical 

 methods hitherto known; and in so doing has found 

 a method of testing the relationships of different 

 tribes of animals that seems little less than magical. 



The tests show, for example, that man is more 

 closely related to the old world monkeys than to the 

 monkeys of the new world; our closest relatives be- 

 ing the chimpanzee, the gorilla, and the orang in the 

 order named. Similarly the relationships between 

 different members of the dog family, the cat family, 

 and the like are traced. Thus the hyena appears to 

 be to some extent intermediate between dog and 

 cat tribes, but, contrary to what might be expected, 

 it is much more closely related to the cat than to the 

 dog. The seal and sea lion, on the other hand, are 

 closer to the dog family than to the cats. Moreover 

 the seals are somewhat more closely related to the 

 weazel tribe than to the felines. 



The porpoise, which might be supposed to be allied 

 to the seal, is found instead to show close affinities 



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