388 W. P. Trowbridge on Deep Sea tei 
ceeding year, in the same explorations, soundings were made to 
the depth of 1500 and 2160 fathoms, without finding bottom; 
but in the latter case the temperature: of the water was recorded 
at the depth named. In 1848, in the explorations off Cape Hat- 
teras, the officer engaged in the explorations lost his instrument, 
with 8300 fathoms of line 
These Gulf Stream eepbinione were —— the first 
nysiematio deep sea explorations ever under 
Our principal object, however, is to sotios ead great de ree: 
where no botiom was found, and to examine whether the failure 
to find the bottom was, einer the circumstances, any preof that 
it did not exist at much less depths than those reported, or 
whether any conclusion whatever can be derived from the re- 
su 
When \ we Tteflect that two-thirds of the earth’s surface is — 
reporte ce 
in different parts of the sea, compared with which the highest 
ear cena ranges are insignificant he ye aa eae instan- 
insufficient data for arriving at any correct conclusions 
regard to the elevations and depressions of the ocean _ ‘What 
idea could be formed, for instance, of the topograp 
country, if our knowledge of its surface consisted in tials 
the height, above the level of the sea, of only one point in every 
to aoelee: interesting facts in regard to them, some of which might re of im: ot 
tors, as all would be to rica science. Professor J. Bailey 
ing fill organisms, 
that is aed smacing—tnireds of millions existing in every cubic inch of these 
green 
“The most sit Siietianin is the one labelled No. 1, latitude 38° 04 40°» 40”, 
longitude 73° se a”, : 0 fathoms. is crow with Po! 
mostly large enough to be recognized by a practised eye without the aid of ee 
fier? A a. , or speciinen which would enable a practised eye to recognize Chet” 
orms—and Professor innit ot promised to illustrate researches by draw 
