ANIMAL INDUSTRIES 



A RECENT and interesting contribution to the 

 sum of popular knowledge of animal instinct is 

 M. Frederic Houssay's work on The Industries of 

 Animals, published in the ' Contemporary Science 

 Series' by Mr Walter Scott. It is an ingenious 

 attempt to bring man and animals into line on 

 the common ground of their provision by industry 

 of the necessities of life. The arts of collecting 

 provisions, storing and preserving food, domestic- 

 ating and managing flocks, and capturing slaves, 

 are quite as well understood by animals and insects 

 as by man in the earlier stages of his civilisation, 

 and show a curious analogy in their development 

 in the case of the more backward among human 

 communities.' Ants of the same species both have, 

 and have not, learnt to keep ' cattle/ Lespe 

 found a tribe of black ants which had a flock of 

 ' cows ' which they milked daily. But he also dis- 

 covered a nest of the same species which had no 



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