On the Depth and Saltness of the Ocean. 35 



temperature 60°; bar. 3005. A quantity of water equal in bulk 

 to 1000 grains of distilled water evaporated, gave — 



: 37-90 



Captain Wilkes, before concluding, alluded to the results 

 of the Exploring Expedition, and gave some account of 

 the progress that was making in their publication. At the 

 same time he presented for the inspection of the Associa- 

 tion some three hundred proofs of the plates of Natural 

 History, a part only of those now in the engraver's hands, 

 which he trusted would prove of interest to the Association, 

 as shewing not only the progress of the work under publica- 

 tion, but the advancement of American art. For the beau- 

 tiful manner in Avhich they are got up and executed, we were 

 chiefly indebted to Mr Drayton, one of the artists of the Ex- 

 pedition, who has charge of the department of publication, 

 and to whose talents and exertions he felt gi-eat pleasure in 

 making this acknowledgment, and expressing Imw much the 

 Expedition, the country, and he himself, were indebted to 

 him. Captain Wilkes also gives strong hopes that the edi- 

 tion of the work of the Exploring Expedition will be en- 

 larged, and he hoped that it would be in the power of all to 

 obtain a complete copy of the work ; at present they were 

 making every exertion which the ability of the country and 

 due economy would permit, to forward it to completion. The 

 Committee of Congress, who have the publication in charge, 

 have every desire to enlarge it ; but they have deemed it 

 proper that the whole work should be first completed, and 

 then it could not be doubted but that the liberality of Con- 

 gress would cause the publication to be extended, so as to 

 place the whole within the mcan.s of t'very institution in the 

 country. 



