78 THE MINDS AND MANNERS 



for the cast-iron brackets, and one by one they gave way. 

 Some were broken off, and others were torn from the wall by 

 the breaking of the screws that held them. Knowing that all 



THE LEVER THAT OUR ORANG-UTAN INVENTED, 

 AND THE WAY HE APPLIED IT 



By W. A. Cam&deo, in the "Scientific American," 1907 



those brackets must be changed immediately, Dohong was left 

 to destroy them; which he did, promptly and joyfully. 



We then made heavy brackets of flat wrought iron bars, 

 % by 2yi inches, unbreakable even with a lever. These were 

 screwed on with screws so large and heavy that our carpenters 

 knew they were quite secure. 



In due time, Dohong tested his lever upon the bars with 

 their new brackets, and at first they held securely. Then he 

 engaged Polly, his chimpanzee companion, to assist him to the 

 limit of her strength. While Dohong pulled on the lever, Polly 

 braced her absurd little back against the wall, and pushed upon 

 it, with all her strength. At first nothing gave way. The com- 

 bined strength exerted by the three brackets was not to be over- 

 come by prying at the horizontal bar itself. 



