218 



distance between the centres oF T^ and V, 



(arm of couple) 

 length of mica plate 

 width ,, 



moment of inertia 

 time of oscillation 'JuU period) 



J. J 90 cm. 

 J 2.70 cm. 

 3.117 cm. 

 J.415 gr. cm"-. 

 0.53 sec. 



magnification of microscope 4 mm. = 87.5 soale divisions on micro- 

 meter. 



In tig. 2 is shown the maimer in which the manometer was 

 mounted. 



Womnx'W. y( 



ywvè> 



KJ 



Fig. 2. 

 The tube B is placed inside a glass tube which is provided with 

 a water-jacket W; through W hot or cold water can be passed, 



