F,g.l3. 

 Diagram showing Decrease of Diamater of 

 Rotation, from ttie Equator to the Poles._ 



Fig.l4. 



Fall of 1 Mile in 5 Miles. 



or a deptti of 1000 Fms ._ 6 Naut, Miles from the Shore. 



Fall of 1 Mile in 10 Miles 



or a depth of 2 000 Fms._20 Naut. Miles from the Shore 



Fall of I Mile in 20 Miles 



Sea Surface 



or a depth of 3000 Fms._60 Naut. Miles from the Shore. 



