320 Miscellaneous Intelligence. 
parisons, or, including peeneane) observations and those on stars 
not conprised in the catalogue, the total number exceeds one 
hundred saa These numbers are quoted as showing the 
tain a description of the photometer, a summary of series, a dis- 
cussion of the effect of atmospheric absorption, results of direct 
eye estimates of relative brightness of the stars, the general cata- 
rogue, and some miscellaneous points connected with the work. 
2. Dimensions of the Gulf of Mexico. (Communication to Mr. 
J. E. Hilgard, ane neusent of the U. 5. Coast and Geodetic 
A. D 
According to the 2h SE given in your “ Basin of the Gulf of 
exico ” (see this Journal, vol. xxi, April, 1881), the area of the 
Gulf of Mexico is 595,000 square miles and the area of the surface 
included within the 100-fathom line, 387,000 square miles; hence 
rather more than one-third of the surface of the Gulf (35 per _— 
has a depth below 100 fathoms. The mean depth of the Gulf 
858 fathoms, which means that a basin of the same surface with 
the Gulf, and of the uniform depth of 858 fathoms will have the 
e seen that the mean ie is rae of ne greatest and the mean 
= of the deeper parts 2 of the sa 
. Bureau of Scientific p esata A generous gift of time 
es 
ination of the results of scientific investigation, and of facilitating 
the work of the student in natural history, the following members 
and officers of the Academy of Natural Sciences have associated 
eee into a Bureau of Scientific ue whose function 
imparting, through correspondence, of precise and 
5 5 
r oO 0 
by the nature of their environs, are precluded from the ‘advan- 
tages to be deriy ed from myseums and librari ies, 
a eed professional char —such as mineral or chemical 
agreement. The Heiss naa may be addressed directly, care of 
the Bureau of Scientific Information, Academy of Natural Sciences. 
A return stamp (two cents) is all that is asked. : 
