190 
Scientific Intelligence. 
sometimes has been quite stationary. With respect to the tem- 
perature below the surface, I have every reason to believe it 
to be the same as the surface-water (at least at such inconsi- 
derable depths as occur in the Frith), and what little dilFerence the 
Register Thermometer has given, I rather suspect, has proceed- 
ed more from some undue movement in the index than from 
any real change in the temperature of the water. — John Fiiem- 
BLY, R. N. Assistant Maritime Surveyor (film Majesty"' s Sur- 
veying Brig Investigator. 
18. Temperature of the Caribbean Sea at great Depths . — 
On the i3th November 18S2, in W. Long. 85 J", and N. Lat. 
SOi®, between Grand Cayman Island and Cape St Antonio, 
Captain Sabine found that the temperature of the sea, at a depth 
of six thousand feet, was 45°. 5 of Fahrenheit, the temperature 
at the surface being 85°. The difference of temperature was 
therefore 57“.5. M. Perron had formerly found this difference to 
be 58° in 5“ of N. Lat. and at a depth of 1200 feet, and 42” in 
N. Lat. 4®, at a depth of 2144 feet. Captain Sabine used Six’s 
registering thermometer, made on purpose for the experiment. 
—See Phil. Trans. 1825, pp. 288, 289. 
II. CHEMISTRY. 
19. Determination of the Masses f the Molecides of Bodies. 
— A very elaborate memoir on this subject, entitled Nouvelles 
Considerations sur la Theorie des proportions determines dans 
les comhinaison^ et sur la determination., des Masses des Mole- 
cides des CorpSy has just been published by the Chevalier Avo- 
ffrado, in the Memorie della Reale Academia delle Scienze di Tu- 
O ' 
rmo, tom. xxvi. p. 1. As it occupies no less than 162 pages, we 
cannot pretend to give any thing like an analysis of it. The 
Chevalier Avogrado has already published his general views on 
the subject in the Journal de Physique for July 1811, and Fe- 
bruaryJ814. In the first part of the present paper, he resumes 
the consideration of thesg, and in the second part he treats of 
the masses of the molecules of particular substances, and of their 
binary combinations. The following are the principal results, 
which we have gleaned from different parts of the memoir. 
