( 75© ) 
tUbtr^ tbe Royal Society You might make fime advantage 
thereof J I miingly offer yon all I there might fretencl to. 
So that, if there was a defire in the Publifher to take out 
a Patent , it was for pa other contrivance, but M. Hugem% 
formerly fent to the Rojal Societf. , and printed in Numl^. 112. 
of thefe Tranfaaions. 
Errata. 
P.7 1 1. 1.14. del. Longitude fonndbyU.'^oxiA Sea, p.716. lp>^.t,the 
in^enimfhe^^ ibid.l. ij.r. the forme K 
Imprimatur, 
EROHMCKER, Rft.i. 
L O N D O 
Printed for John Martyn, Printer to the Royal Society, 1676. 
