24 



Art, 7. — K. Terazawa : 



the formula (54), and in the fourth cokimn are given those 

 calculated by means of the formula (55); the value of w being 

 taken as 3 grammes weight per eul)ic centimetre. 



Example III. 



§21. Next we will consider the case in wliich a uniform 

 normal pressure acts on the surface within a circular area of radius 

 a, outside of which tlie surface is free from traction. 



Suppose 



/(?•) = — , , for a :> r, 



(56) 



= 



,, a<zr 



n being again the total amount of the given pressure. The 

 function Z(Jc) will be 



Z{T,) 



II 



Tta 



- J ~a 



(57) 



and the components of displacement can l)e computed from the 

 form u he 



tr = ^^ fc-''J,a-r\J.{la)âl- 



II 



2ïï-a(; + ^) 



fe-''M,(lT^J,a-a)^ 





(58) 



