1883.] | Recent Literature, 523 
chologists and libraries to number the “ Jahrbuch” among their 
ssions. One suggestion may be permitted: that the future 
numbers should contain an exact statement of the date of publi- 
cation, which could be relied on in matters of priority, a matter of 
some importance in these days of rivalry in research—W*m. H. 
Dail. 
PROCEEDINGS OF THE MINERALOGICAL AND GEOLOGICAL SECTION 
OF THE ACADEMY OF NATURAL ScIENcEs 1880-1881. No. 2.— 
This is a neatly printed little pamphlet of thirty-eight pages, con- 
taining the notes on subjects germane to the objects of the sec- 
tion, according to the title, during the years 1880-1881, and (to 
judge from Mr. Rand’s last contribution on the volume Cs of the 
2d Geological Survey’s publication, which did not appear till late 
in 1882), for this latter year also. 
‘here are thirty-six papers and short observations in all, of 
Which fourteen are by Professor H. C. Lewis (secretary), and five 
Mr. Theo. D, Rand (director), the latter including the only 
i moderately long papers in the pamphlet. These are, in 
wality, the only parts of the volume which can be reviewed, and 
'S Proposed to devote a few words to them. The first of these 
a. called, “ Notes on the Geology of Radnor and vicinity,” 
and is mainly a criticism of Mr. Chas. E. Halls paper on the 
Nelations of the crystalline rocks in Eastern Pennsylvania 
Mr mary Phil. Soc., Jan. 2, 1880). Speaking of the serpentine, 
of Rad ? says, that between the outcrops of the rock north-west 
tine nor station and that near the Paoli, no outcrops of serpen- 
ago been noted. 
in Roy fand doubtless refers to the description of serpentine areas 
belt of u final report, Vol. 1, p. 168, when he skips from his second 
the upp son rock (south of the narrow limestone trough of 
Hall had part of Gulf creek) to his third belt near the Paoli. Mr. 
Ware no occasion to mention the occurrences outside of Dela- 
: unpubl ontgomery counties in C,, nevertheless in the as yet 
— Exsttown ¢ but stereotyped C,, he does describe the outcrops in 
Possibly how tship, Chester county. These outcrops could not 
ape ave escaped the observation of any geologist who has 
6 otal township at all. Mining operations were conducted 
a Mor to the publication of Rogers’ report, and it seems 
