70 Scientific Intelligence. 



Bulletins. No. 243. Cement Materials and Industry ; by 

 Edwin C. Eckel. 395 pp., 15 plates. 



No. 255. The Fluorspar Deposits of Southern Illinois ; by 

 H. Foster Bain. 15 pp., 6 plates. — This bulletin gives an 

 account of the fluorspar mines in Hope and Hardin counties in 

 the extreme southern part of Illinois. The principal mines are 

 near Rosiclare, Elizabethtown and Cave-in-Rock on the Ohio 

 river in Hardin County. The discovery of the deposits goes 

 back to 1839, although the material was not definitely mined 

 until the early 70's. The author discusses the geology of the 

 region in detail, and shows that the deposits of fluorspar, with 

 the accompanying ores of lead and zinc, are vein deposits occur- 

 ring along faulting fissures. The amount of fluorspar produced 

 from the region in 1903 was 18,360 short tons, as compared with 

 29,000 tons from Kentucky and 628 from Arizona and Tennessee. 

 The highest grade is used in the enameling, chemical and glass 

 trades. The second grade is used in steel making, being used 

 in open-hearth work because of the great fluidity which it gives 

 the slag. Twenty thousand tons are used annually in this work. 

 The lowest grade is used in foundry work, and there seems to be 

 an almost unlimited market for it. 



Water Supply Papers. No. 126. Report of Progress of 

 Stream Measurements for the calendar year 1904. Prepared 

 under the direction of F. H. Newell, by N. C. Grover and 

 John C. Hoyt. Part III, Susquehanna, Patapsco, Potomac, 

 James, Roanoke, Cape Fear and Yadkin river Drainages. 



No. 260, Contributions to Economic Geology, 1904 ; S. F. 

 Emmons, C. W. Hayes, geologists in charge. 620 pp., 4 plates, 

 25 figures. — The prompt and liberal return which the Geological 

 Survey makes to the country at large for its pecuniary support 

 is well shown by the numerous publications, appearing each year, 

 which to a greater or less extent are devoted to Economic Geol- 

 ogy. The publications of 1904 of this character, for example, 

 included a Monograph by Yan Hise ; ten professional papers, 

 chiefly on ore deposits in different regions ; three bulletins and 

 two folios, the last on the Globe and Bisbee Districts in Arizona. 

 The present bulletin is the third bearing this title, its predeces- 

 sors being Nos. 213 and 225, for the years 1902 and L903. The 

 object of these particular bulletins is to bring before the public, 

 with all possible promptness, the economic results obtained by 

 the Survey parties. Many of the subjects here presented are to 

 be more fully discussed in other papers, appearing independently. 

 The production of gold and silver are naturally presented at 

 length ; also that of tin, copper, zinc, lead and iron. Special 

 chapters are given to some of the rare elements, as molybdenum, 

 vanadium and uranium in Utah, etc. Coal, oil, gas and salt 

 also form the subjects of special chapters. Many different authors 

 contribute to the volume. 



2. Preliminary Report on the Geology and Underground 

 Water Resources of the Central Great Plains ; by N. H. Dar- 



