[I 9 2I.] 



52 



JENTZSCH. A., 6. Ueber die Nordliche Fortsetzung der Oberschlesischen Keuper- 



tafel. Jalirh. k.-preuss. geol. Landesanst. pp. 133-140. 1919. 

 . See also Otto, T. 



JESSEN, A. Stenalderhavets Udbredelse i det Nordlige Jylland. [With English 



Summary.] Damn. geol. Undersog. ser. 2, no. 35, pp. 1-112, map. 1920. 

 2, V. Madsen, & others. Brorup-Mosemes Lejringsforhold. [With French 



Summary.] Ibid. ser. 4, no. 9, pp. 1-44, figs. 1918. 

 JESSEN, K. Moseundersogelser i det Nordostlige Sjadland. Med Bemserkninger 



om Trseers og Buskes Indvandring og Vegetationens Historic [With English 



Summary.] Ibid. ser. 2, no. 34, pp. 1-268, hgs. 1920. 

 JILLSOX, W. R. Low-Sulphur Coals of Kentucky. Trans. Am. Inst. M. K. lxiiL 



pp. 723-726, fig. 1920 ; & Bull. Kentucky Geol. Surv. ser. 5, no. 4, pp. 70-74, 



fig. 1920. 



2. The Oil and Gas Resources of Kentucky. 2nd Edition. Ibid. no. 1, 



pp. i-xvi, 1-630, figs., pis. i-iv [geol. maps ;. 1920. 

 — — 3. Sketch of the Development of the Oil and Gas Industry in Kentucky 



during the Past Century (1818-1918). Ibid. pp. 1-27, figs. 1920. 

 4. The Used and Unused Natural-Gas Fields of Eastern Kentucky, and their 



Relation to Present and Future Public Service Demands. Ibid. pp. 28-35, fisrs. 



1920. 



5. Structural Deformation, and its Relation to Proven Oil and Gas Accumu- 

 lation in Eastern Kentucky. Ibid. pp. 36-46, tigs. [geol. map]. 1920. 

 ■ 6. The Stntus of a Mauch Chunk in Southeastern Kentucky as a Producer 



of Petroleum and Natural Gas. Ibid. pp. 47-55, fig. 1920. 

 7. The Kendrick Shale — a New Calcareous Fossil Horizon in the Coal 



Measures of Eastern Kentucky. Ibid. pp. 56-64, figs. 1920. 

 8. The Migration of the Headwaters Divide of Right Middle Creek, Flovd 



County, Kentucky. Ibid. pp. 65-69, fig. 1920. 



9. The New Oil and Gas Pools of Allen County. Ibid. pp. 75-97, figs. 1920. 



■ 10. The Oil and Gas Geology of Breathitt and Knott Counties. Ibid. 



pp. 98-139, figs. 1920. 



11. A Bibliography of the Coals of Kentucky. Ibid. pp. 140-156. 1920. 



— — 12. The Production of Coal in Kentucky. Ibid. pp. 157-175, figs. 1920. 

 — — 13. The Wier Sand — a Newly Recognized Oil Horizon in Eastern Kentuckv. 



Ibid. pp. 176-188, figs. 1920. 



14. The Pay Oil Sands of Eastern Kentucky. Ibid. pp. 189-222, figs. 1920. 



15. The New Oil and Gas Pools of Warren Count}*, Kentucky. Ibid. 



pp. 223-251, figs. 1920. 

 16. A Bibliography of Kentucky Petroleum, Natural Gas, Asphalt, and Oil - 



Shale. Ibid. pp. 252-262. 1920. 

 17. A Preliminary Report on the Oil-Shales of Kentucky. Kentucky Geoh 



Surv. ser. 6, ii. pp. 1-37, figs. 1921. 

 18. Kentucky Rock-Asphalt — the Ideal Road Surface. Ibid. pp. 39-57, figs. 



1921. 



19. Geological Problems in the Recovery of Oil and Gas in Kentucky. Ibid. 



pp. 59-70. 1921. 



20. The Value and Direction of State Geological Surveys. Ibid. pp. 117- 



124. 1921. 



21. The Ultimate Source of Kentucky Crudes. Ibid. pp. 145-157. 1921. 



22. Production of Fluorspar in Western Kentucky. Ibid. pp. 159-175,. 



figs. 1921. 



■ 23. Geology of Oil and Gas in Grayson Count}-. Ibid. pp. 177-225, figs. 



1921. 



24. A Mauch Chunk Island in the Mississippian Seas of Eastern Kentuckv. 



Ibid. pp. 227-232, figs. 1921. 

 25. The Sandy Hook Anticline — a Newly Discovered Oil and Gas Structure 



in Elliott County, Kentucky. Ibid. pp. 233-270, figs. 1921. 

 26. The Campbellsville Anticline in Taylor County. Ibid. pp. 271-286, figs. 



1921. 



27. Paint Creek— Pirate. Ibid. pp. 287-295, figs. 1921. 



JIM INEZ, C. P. Estadistica Mi n era del Peru en 1919. Bol. Ing. Minas, Peru, 



no. 100, pp. 1-219. 1921. 

 JOCHAMOWITZ, A. Los Boratos de America y en especial los Boratos del Peru. 



An. Congr. nac. Ind. minera, Peru, v. pp. 1-88, figs. 1919. 

 JOHN, C. H. von. Obit.— See Spexcer, L. J., 2. 



JOHNSEN, A. Die Entwicklung der Orthoklaseinsprenglinge im Magma. 

 Zeitschr.f. Krist. lvi. pp. 423-424. 1921. 



