408 



THE HUMAN MOTOR 



J3astara(Si/e (Semi-smooth) 



Pressure of the two hands. 



component of left liatnd 



Horizontal component of left hand 



Horizontal component of right nand 



directly or through a cord, 

 which the pressure of the 

 hands is exerted. The 

 value, in kilogrammes, cor- 

 responding to any given 

 height of ordinate can^thus 

 be obtained. It is essential 

 that the apparatus shall be 

 recalibrated for each series 

 of experiments, as the indi- 

 cations of the receiving 

 tambours do .not remain 

 absolutely constant. 



Fig. 281 shows the cali- 

 bration graph for the ex- 

 periment shown in fig. 280. 

 Here the weights corres- 



to the portions of the apparatus at 



t 



PI 



Pressure 

 n n n 



4-57 /O Kg. 



yerficai component of left hand 

 n n PI 



ffenzon tat component of te/r hand 



n-n 



horizontal component of right/} and 



n n PI . 



2 3 3 Kg. 



fif.sof 





