350 The American Geologist. May, isfeT 
A Summary of ProgresH in Petrography in l^OC. By W. S. Bayley. 
(From monthly notes in the Amer. Natuv(dist. Waterville, Me., 1897. 
Price 50 cents.) These summaries, of which the present is number 15, 
contain the author's well-known monthly notes arranged in consecutive 
order and having their original pagings. An index of authors and one 
of subjects havw been added. u. s. G. 
Biennial Report of the State Oeologiat [of Missouri] transmitted 
by the Bnreau of Geology and Mines to the 39th General Assem- 
bly. By C. R. Keyes. (Mo. Geol. Survey, 63 pp., 7 pis., 1897.) This 
report reviews the work of the Missouri Survey, especially for the last 
two years, gives statements of the results accomplished in various lines 
and outlines the investigations already in progress or contemplated. The 
work has been mainly along two lines, subject work and areal work. 
The first has been given more attention thus far, while the second is 
well under way. Thus far the printed areal work has been confined to 
small areas, or sheets, in the mining districts, but one county (Green) re- 
port is nearly ready for the printer and in another county the mapping 
is practically finished. 
The work in progi-ess consists of eleven detailed sheets, reports on five 
of which will appear soon; an extended investigation of the coal depos- 
its, which it is hoped will be ready for publication during the ensuing 
year: a report on the building and ornamental stones; work on the for- 
mations and structure of the Ozark region; summary of the general ge- 
ology of the state; an investigation of the minerals not mined; and re- 
ports on the resources of the different counties. 
The publications thus far issued are: (1) four biennial administrative 
reports; (2) five bulletins, — bulletins are now discontinued; (3) eleven 
larger volumes, and a twelfth (areal geology) is in press. u. s. g. 
RECENT PUBLICATIONS. 
/. Government and State Rejjorts. 
Mo. Geol. Survey, vol. 10, 533 pp., 22 pis., 1896. Physical features of 
Missouri, C. P. Marbut; Formation of Quaternary deposits, J. E. Todd; 
Bibliography of Missouri geology, C. R. Keyes. 
Mo. Geol. Survey, vol. 11, 632 pp., 39 pis., 1896. Clay deposits, H. 
A. Wheeler. 
Boletin de Instituto Geologico de Mexico, Nums. 4, 5 y 6, 270 pp., 
plates and map, 1897. Antonio del Castillo (sketch, with portrait), J. G. 
Aguilera; Prologo, J. G. Aguilera; Estados de Durango, Chihuahua, So- 
nora y Sinaloa, R. F. Buelna; Itineraries geologicos, Ezequiel Ordonez: 
Itineraries geologicos, J. G. Aguilera; Sinopsis de geologia Mexicana, 
J. G. Aguilera; Rocas eruptivas, Ezequiel Ordoiiez. 
Proc. U. S. Nat. Mus., vol. 18, 1896. Diagnoses of new Tertiary fos- 
sils from the southern United States, W. H. Dall; Notes on asbestos 
and asbestiform minerals, G. P. Merrill; Description of four new Trias- 
