Geology and Mineralogy. 251 



on mineral resources, 130,000 for survey of foi'est reserves. The 

 preparation and printing of maps and reports also aggregates a 

 large amount. In addition 80,000 was appropriated for continu- 

 ation of the investigation of the mineral resources of Alaska and 

 60,000 for testing coals. 



Among the many interesting results of the year's work may be 

 singled out the finding on Cape Lisburne of 15,000 feet Of Juras- 

 sic strata containing 150 feet of Jurassic coal distributed in over 

 forty beds, at least ten of which are four feet or more in thickness, 

 the first Jurassic coal to be found in Alaska. In addition the 

 Carboniferous was found to contain some coal, being the only 

 Paleozoic coal of economic value known in America west of the 

 Rocky Mountains. The coal and petroleum deposits about Con- 

 troller Bay have also been found to be of importance. 



Under the subject of topography it is noted that the total area 

 of new surveys was 21,296 miles, making a total of 955,996 miles 

 surveyed, or 32 per cent of the area of the United States. Those 

 familiar with the maps will have noticed the improved quality 

 of those issued in recent years. 



Sixteen folios, forming Nos. 110 to 125 of the geological atlas 

 of the United States, have been published during the past year. 



In the investigation of the mineral wealth of the United States 

 and the education of the mining public in regard to the nature 

 of economic deposits with consequent economization of time and 

 money in their exploitation, the Survey has justified itself many 

 times over ; but its chief claim for world-wide recognition is 

 founded on the more purely scientific work done, which in the 

 past quarter century has contributed either directly or indirectly 

 more than any other one factor toward the advances of modern 

 geology. j. b. 



2. U. S. Geological Survey. Recent Publications. — The fol- 

 lowing list contains the titles of recently issued publications. 



Topographic Atlas. — Ninety-nine sheets. 



Folios — No. 127. Sundance Folio : Wyoming-South Dakota. 

 Description of the Sundance Quadrangle : by N. H. Darton. 

 Pp. 12, with 5 colored maps and 9 figures. 



No. 128. — Aladdin Folio: Wyoming-South Dakota-Montana; 

 by N. H. Darton and C. C. O'Harra. Pp. 8, with index map 

 and 4 colored maps. Washington: 1905. 



No. 129. — Clifton Folio : Arizona; by Waldemar Lindgren. 

 Pp. 13, with 4 colored maps. 



Professional Papers. — No. 37. The Southern Appalachian 

 Forests ; by H. B. Ayres and W. W. Ashe. Pp. 291, with 37 

 plates, two figures, and two colored maps. 



No. 40. — The Triassic Cephalopod Genera of America ; by 

 Alpheus Hyatt and James Perrin Smith. Pp. 394, with 85 

 plates and one figure. 



No. 43. — The Copper Deposits of the Clifton-Morenci District, 

 Arizona; by Waldemar Lindgrent. Pp. 375, with 25 plates, 19 

 figures, and one colored map. 



