204 Coast Survey Report for 1853. 
this, there is no occasion for present remarks. In proceeding to 
ive an abstract of science in the Report of 1853, we ma 
vantageously make use of the following heads. 1. Gulf Stream 
explorations; 2. Tides and tide gauges; 3. Longitude opera- 
tions ; 4. Geographical positions ; 5. Map projection tables and 
notes; 6. Publishing records and observations ; 7. Miscella- 
neous. ‘The remaining subject matter of the report lacks purely 
scientific interest, and could scarcely be abstracted. ‘The details 
of field and office operations, the examinations of light house 
Sites, the lists of parties, &c. are given with the customary full- 
hess, constituting a thoroughly digested record of the yeat’s 
Operations, 
on all its physical and phenominal elements. This giant prob- 
lem is thrown down as a gage at our national door, and the 
along these sections, the several elemeuts required, Between 
Cape Fear, Charleston, St Simons, St. Augustine and Cape ©@ 
naveral. The results for 1853 are given in a sketch of detailed 
devoted to a full exposition of the resulis already reached. 
The element of temperature, superficial and at various depths, 
in 
tou’s metallic deep-sea thermometer for the greater depths, a te™- 
perature sounding of 2160 fathoms having been made. 9 
general result of 
