tion flows through the blood vessels of the two. No other 

 animal has like blood. 



Animal species which are not related have different blood, 

 i. e., the blood of one species is more or less deleterious to 

 the blood of the other. In a few minutes, for instance, the 

 cat and the ral)l)it die with spasmodic symptoms, when by 

 connecting- the carotid arteries the blood of these animals 

 flows together, because the red blood corpuscles of one kind 

 of bloodare destroyed by the serum of the other. With two 

 cats or two rabbits, on the contrary, this experiment can be 

 made with impunity, as they possess the same kind of blood. 

 In this respect species of animals which are closely related 

 possess, likewise, the same kind of blood. So, for instance, 

 the blood of the horse and the ass, of the dog and the wolf, 

 of the hare and the rabbit, etc., may be mixed without harm : 

 the respecti^•e red corpuscles are not destroyed. 



The blood serum of man destroys the red corpuscles of all 

 animals experimented upon, such as the frog, the eel, the 

 viper, the pigeon, the hen, the heron, the horse, the pig, the 

 cow, the rabbit, the guinea-pig, the dog, the cat, the hedgehog, 

 the lemurs, the monkeys of the New World (Ateles. Pithesci- 

 urus) and monkeys of the Old World (Cynocephalus, Macacus, 

 Rhesus), exce-ot the red corpuscles of the anthropoid apes. 



ANIMALS, VERY CLOSELY RELATED WHICH 

 HAVE THE SAME KIND OF BLOOD, e. g., the horse and 

 the ass, the horse and the zebra, the dog and the wolf, the 

 hare and the rabbit, the leopard and the puma, the lion and 

 the tiger, the wanderoo monkey and the brown-black macaque, 

 HAVE OFFSPRING Oiybrids). 



MAN AND ANTHROPOID APES HAVE LIKEWISE 

 THE SAME KIND OF BLOOD, AND CONSEQUENTLY 

 A CROSSING OF THE TWO MUST ALSO RESULT IN 

 OFFSPRING. 



This scientilic basis of the crossing of man and anthro- 

 poid apes is so certain, that it is of the greatest importance to 

 make the experiment. 



The fecundation could be done in an artificial way so tliat 

 anthropoid apes could be fecundated artificially by the sperm 

 of man, especially by the sperm of pygmies (dwarfs of the 

 Congo) and of several negro races. 



It would be necessary to do all these experiments in the 

 Congo because the anthropoid apes, when removed from their 

 native climate, nearly all die of consumption, bronchitis and 

 pneumonia, before they are full grown. 



In their native habitat the anthropoid apes can be pro- 

 vided with those natural physical conditions and surrounding 

 which are necessary to the success of this kind of experiment. 

 They must not only have scientifically arranged cages, but 

 also isolated parts of the wood at their disposal. This is to be 



33 



