terest. Prof. Bache states that on the coast of the Atlantic 
half. and Gulf of Mexico, the work of the survey 18 more than 
ran; completed and the present rate of progress being more 
Pid than the former, he estimates that in ten or twelve years 
He field work will be essentially completed in all the sections 
two. Forty-one plates have been completely engraved dur- 
ng the year, beside twenty-eight which have been in progress. 
