JOURNAL AND PROCEEDINGS. fot 
lands, plateaus, hills, mountain-ridges and land swells. These are 
arbitrary divisions, intended solely to shorten the printed descriptions 
and make them definite. To these groups are added the rills, or 
peculiar markings first noticed by Schrceter, that have somewhat the 
appearance of river-beds, but which some take to be fissures in the 
moon’s crust. Several years since, Schmidt had a list of five hun- 
dred of these peculiar lines, and to present date that number is more 
than doubled. 
Neison retains the names Beer and Meedler gave the four hun- 
dred and twenty-seven formations shewn on their map. To these 
he adds eighty-six others, making his map contain in all five hun- 
dred and thirteen formations. Each of these is described in the 
order of its place, and for easy reference an alphabetical list is also 
given. For every formation he cites the authority for its name and 
degree of brightness, and for craters and plains he gives their dimen- 
sions, and for mountains their height. ‘The position in lunar latitude 
and longitude is given for each formation, in most cases to minutes, 
in some to seconds. Minute particulars are also furnished respecting 
parts of special interest, with name of observer and date of observa- 
tion. ‘Tables and formule to aid in computation are given, that the 
book may be of service to students desirous cf engaging in original 
work. In proof of the merit of this book it was translated into 
German so soon as published. 
Photography has been pressed into service for taking views of 
the moon. Dr. Henry Draper, of the University of New York, 
many years ago took excellent lunar pictures, using a silvered glass 
speculum he himself made, and mounted especially for taking lunar 
photographs. Prof. Rutherford, of New York, afterwards carried the 
art to still greater degrees of excellence ; and although he had com- 
petitors in all parts of the world, a most competent judge, writing in 
the latest edition of the Encyclopzedia Britannica, pays Mr. Ruther- 
ford the compliment of calling his the best photographs of the moon 
that had then been taken. During the decade just past, excellent 
lunar pictures have been taken at many of the great astronomical 
observatories in various parts of the world; those from Paris and 
from the Lick and Yerkes observatories being widely known and 
highly esteemed. 
The field of lunar investigation is large, its laborers many, and 
