114 



RECONNAISSANCE IN NORTHERN ALASKA IN 1901. 



should be noted that in the shale associated with the coal there is reported to have 

 been found by Mr. Dumars a small specimen of Lcpi<l<><1< iiilron, which has been 

 determined by Mr. David White, who states that it is related to L< i>i<lut1<n<lron 

 chemungense, and that it indicates an age for the shale either of Upper Devonian in- 

 Lower Carboniferous. 



Mr. Maddren also reports that in the valley between Cape Dyer and The Ears 

 (shown in tig. 1) a syneline of shales occurs containing at least one exposure of coal 

 along the low sea bluff that rises from 50 to 100 feet above tide. He also states that 

 just south of Cape Lewis there is a bluff of shales that seem to contain "coal blossom." 



ANALYSES OP COAL. 



The following analyses were made by Mr. George Steiger, chemist of the Survey: 



Table of coal analyses. 





187 



Koyukuk 



River 



above 



Tramway 



Bar. 



607 



Anaktu- 

 vuk River. 



620 



Colville 

 River. 



653 



Wain- 

 wriglit 

 Inlet. 



665 



Cape 

 Beaufort. 



669 



Corwin 

 mines. 



671 



Corwin 

 mines. 



Cape 

 Lisburne.a 





4.47 

 34.32 

 48.26 

 12.95 



6.85 

 36.39 

 43.38 



"13. 38 



11.50 

 30.33 

 30. 27 

 27.90 



10.65 

 42.99 

 42.94 



3.42 



7.18 

 36.38 

 51.23 



5.21 



10.47 



40.12 



46.16 



3.25 



7.23 

 38.68 

 50.05 



4.04 



3.75 



Volatile matter 



Fixed carbon 



Ash 



43.75 



47.39 



5.11 







Sulphur 



100. 00 



100. 00 



.54 



Trace. 



None. 



1.20 



100. 00 



.50 



Trace. 



None. 



100. 00 



.62 



Trace. 



None. 



100. 00 



.48 

 Trace. 

 None. 

 1.4 



100. 00 



.27 



Trace. 



None. 



1.10 



100. 00 



.23 



Trace. 



None. 

 1.30 



100. 00 

 .36 



Phosphorus pentoxide 

 Coke 











Fuel ratio 



1.40 



1.08 











CLIMATIC CONDITIONS. 



METEOROLOGIC RECORD FOR 1899. 



The following is a record of meteorologic observations made by the writer on 

 a reconnaissance along Chandlar and Koyukuk rivers in 1899, mainly in latitude 65° 

 to 68 u , longitude 145° to 158°. The localities at or near which they were made are 

 designated by the position of the dates (month and day) on the map.* 



The thermometer used in this work is an H. Green, cylindrical bulb, Fahrenheit 

 scale. 



a Brooks, A. H., The coal resources of Alaska: Twenty-second Ann. Rept. U. S. Geol. Survey, pt. 3, 1902, p. 565. 



frSchrader, F. C, A reconnaissance along the Chandlar and Koyukuk rivers, Alaska, in 1899: Twenty-first Ann. Rept. 

 U. S. Oeol. Survey, pt. 2, 1900, opposite p. 448. 



The localities refer to camps pitched by the party en route at the close of its day's traverse. Hence the morning obser- 

 vation of any given date was usually made at the camp preceding the one of the date by which the observation is designated 

 on the map, and the 2 p. m. observation of the same date was made at a point about midway between the two camps. 



