212 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



to make an examination and survey of that section of the 

 American isthmus which lies between Valencia Point and the 

 Changenola River, on the Atlantic side, and the Boca Chica, 

 the Rio Pedrigal, and the upper part of Golfo Dolce, on the 

 Pacific side. This is to include an examination of the inter- 

 vening country, of the two Cordilleras, and exploration of the 

 courses of the rivers from their outlets to their sources, within 

 the above limits, for the purpose of ascertaining the possibil- 

 ity of such a connection as may be feasible for the construc- 

 tion of an interoceanic canal. 



ROHLE's TRAVELS IX AFRICA. 



An appendix to Petermann's Mittheilungen, recently pub- 

 lished, contains the report of the journey of Gerhardt Rohlfs 

 through North Africa, from Kutha to Lagos, and is illustrated 

 by two maps, executed in the usual elegant style of every 

 tiling emanating from the establishment of Justus Perthes. 

 The paper contains valuable additions to the general subject 

 of the geography, physical character, and meteorology of Af- 

 rica. Dr. Petermann states that a second German expedition 

 (that of Buchholz, Ltihder, and Reichenow) is at present oc- 

 cupied in moving from the Gulf of Benin northward into the 

 country covered by the present report. 



powell's report. 



The report of Major Powell of his survey along the Colo- 

 rado of the West, during the year 1872, has just been printed 

 by Congress, and embraces as its most striking feature an ac- 

 count of a remarkable series of folds and faults in the earth's 

 strata, of the highest interest to the geologist. Numerous 

 practical results of value are recorded, especially the discov- 

 ery of coal, salt, and metals. Very large collections of spe- 

 cial ethnological interest were gathered. An appropriation 

 of $20,000 is asked for by the major to continue the work 

 during the current year. 



