480 Scientific Intelligence. 



6. The Geology of the Corocoro Copper District of Bolivia; 

 by Joseph T. Singewald, Jr., and E. W. Berry. Johns Hop- 

 kins Univ. Studies in Geology, No. 1, 117 pp., 15 pis., 1922 

 ($1.25). — Here is described the geology of the Corocoro district 

 from the standpoint of the stratigrapher, paleobotanist, and 

 economic geologist. The district stands at an altitude of over 

 13,000 feet, but in Pliocene time, when these muds and sands of 

 fresh water origin were being deposited, with a measured thick- 

 ness of more than 17,000 feet, the elevation was at or below 6,500 

 feet. The entombed flora consists of one fern, one gymnosperm, 

 and twenty dicotyledons, all of genera "which still survive at 

 lower levels east of the Andes, where they are represented by 

 closely allied species." Overlying the plant beds is another 

 series (Desaguadero), which may be of Pleistocene age. In 1919 

 the district yielded about nine million pounds of copper. 



This paper is the first one of a new series to be issued by the 

 Johns Hopkins University. Four other parts on the geology of 

 South America are announced. This serial deserves support 

 because of the good geologic and paleontologic results which have 

 long been emanating from the Department of Geology at the 

 Baltimore institution. c. s. 



7. A Guide to the Fossil Remains of Man in the Department 

 of Geology and Palceontology in the British Museum of Natural 

 History. Third edition, 34 pp. with 6 plates and 14 text-figures. 

 London, 1922. — Recent interest in the remains of fossil man has 

 been much stimulated by Mr. Charles Davison 's discovery of the 

 Piltdown skull, by that of the Rhodesia remains (this Journal, 

 4, p. 96) and finally by Harold Cook's discovery of a tooth at 

 Agate, Nebraska, interpreted by the authorities in the American 

 Museum as the first ' anthropoid primate found in America 

 (see page 478 in this number). Hence the unusual value of this 

 small volume in which the whole subject (except as to the 

 Nebraska Hesperopithecus) is clearly but concisely presented in 

 all its relations. 



8. Illinois Geological Survey; Frank W. DeWolf, Chief. — 

 Bulletin 42 (322 pp., reclamation map of Illinois in pocket), is 

 devoted to the engineering and legal aspects of law drainage in 

 Illinois. Of the two authors, G. W. Pickels has prepared part I 

 on the status of drainage in September, 1920 ; also part II on 

 engineering problems, and part IV on State aid. Part III, deal- 

 ing with legal problems, is by F. B. Leonard, Jr. The discus- 

 sion of the whole subject is enlightening as showing the difficul- 

 ties in the organization of districts under existing laws and the 

 obstacles met with in the effort toward the reclamation of large 

 areas of fertile lands in the river bottoms. The investigation 

 begun in July, 1919, was completed in September, 1920, most of 

 the field work being done in the spring and summer of 1920. 



