To face page 64. 
Doublet at D, axis veptieal. 
Forces in Meridian Section. 
Radial Force (Black) _ 
Vertical Force (Red) 
right 
left 
up 
down 
0 / S 10 
J_I__J_ i _1_I_I---i-1-1-' 
Doublet 8-t D, axis horizontal. 
Forces in Meridian Section. 
