264 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



the preparation for the use of the government of a series of 

 charts indicating, with a close approximation, the nature of 

 the surface as found, and its consequent adaptability to the 

 various industries. 



A small office force has been constantly employed in con- 

 structing the maps for the finished atlas from the large amount 

 of original material already collected. 



The San Juan mininoj re^'ion of Southwestern Colorado has 

 been delineated upon a scale of one inch to two miles, and 

 shows eftectively the peculiar mountain structure of this 

 wonderful region, in which nestle the heads of seven large 

 streams the Rio Grande, the Lake Fork of the Gunnison, 

 the Uncompahgre, the Unanup, the San Miguel, the Dolores, 

 the Mancos, and the Las Animas Rivers. 



During the year Vol. V. (Zoology) of the 4to Reports has 

 been issued, containing 1023 pages, with forty-five plates and 

 three wood-cuts. 



A catalogue of the mean declination of 2018 stars, used 

 for the determination of latitude by the zenith telescope, by 

 Professor T. H. Safford, is passing through the press, and a 

 volume by Professor Coj^e upon the Vertebrate Paleontology 

 of portions of New Mexico is soon to be issued. The regu- 

 lar Annual Report of the Survey for 1876 is accompanied by 

 seven atlas sheets, and has, in addition to the usual matter, 

 several papers on subjects relating to Natural History, and 

 a discussion of the possibility of diverting the Colorado River 

 of the West for the purpose of irrigation. Two trips were 

 made during the season of 1875 and the subsequent winter 

 by a party under Lieutenant Bergland, U. S. A., to make cer- 

 tain measurements, as w^ell as a general examination of the 

 subject, with unsatisfactory results as regards any information 

 pointing to a successful accomplishment of such a scheme. 

 These results are set forth in Appendix IL of the Annual 

 Report of the Chief of Engineers for 1876. The report upon 

 the collections from Lidian mounds, in Southwestern Cali- 

 fornia, by Drs. Yarrow, Rothwell, and others, in 1875, is un- 

 dergoing examination by Professor W. F. Putnam, of Har- 

 vard College, and will soon be published. 



