for the Promotion of Science. 401 
New York now has more ee aeado in a week than Charleston has 
ina year. Perhaps Dr. i agence and Jers 
emiah Thompson & Co. w acket-ships, may be regarded as 
the two most powerful ane of the many concerned in this revolution. 
The frequent and general use of the water-thermometer by naviga- 
tors, is the only means by which we can arrive at a proper knowled 
of at pe —— of the _— of the currents and isothermal 
The Bircaty of the Navy has authorivied copies of these charts to 
be given to-every navigator who would return to the National Observa- 
tory, according to form, an abstract of his voyage. Several thousand 
sheets of the chart have.alre oe been distributed upon these terms, and 
there are now engaged upon all parts of the ocean, hundreds of ves- 
sels making and noord: PLE for ihis work. Never before 
was such a corps of observers Known. The commercial marine of no 
country can boast of more accomplished “— than thove of the 
United States. 
The iegpoctate of simultanegus observations in all parts of 
ocean, was dwelt upon with much ohare ness. The field is as wi 
as the ocean, and there is room in ¢ for taultftodes of laborer: 
The work is not exclusively for the bené of any one nation or agr 
and it was suggested w whether the states of Christendom mig t not be 
induced to cooperate “by, their navies in the undertaking. . 
The next 1 meeting of this Association, ees adjo al 
to Cambridge, M n the 2d Tuesday (14th) of August, 1849. 
Presid, es Shand y; Secretary, Dr. Jerrries Wyman. 
— character of the Philadelphia meeting—the great 
i st it has excited in the minds of those who were present 
é piaee offered by Cambridge to draw together men of 
the g acscash, to prepare a full report of all the papers 
read befor ir several meetings, and to submit them to a Pub- 
lishing ee, Who are charged ‘with the i tea of a volume 
befote th the Featous, will be published, unless the same have been 
furnished or approved by the authors. It is hoped that anothe 
year may enable the Association to publish a volume with | 
memoirs and reports, as well as abstracts. For this purpose, @ 
much more general enrollment of members will be 
The present session of the Association lasted five days, during 
which time, three daily sessions were held, in the halls of the 
University “of Pennsylvania on Ninth street. 
Become prow Vol. VI, No. 18.—Nov., 1848. 
