INDEX TO CONTEIBUTORS. 43 



•0. E. DUTTON. 

 Page 



52. The pressure developed by the explosion of gunpowder. 



54. Experiments on different kinds of gunpowder. 



74. Elevations and subsidences of the earth's surface. 



89. Geological time. 



90. Mallet's theory of formation of physical features of earth. 

 96. Recent improvements in the economy of fuel. 



91. Recent improvements in the manufacture of steel. 

 98. The chemistry of the Bessemer process. 



102. Remarks on volcanic action. 



J. R. Eastman. 



68-YO. Comparison of thermometers used at Naval Obs. 

 85-8*7. Frequency of the occurrence of numbers. 



A. B. Eaton. 



22. The preservation of foods. 



E. B. Elliott. 



29. Borrowing power of the United States. 

 31. New coinage of Japan. 

 35. Locus of point of equal illumination. 

 45. Remarks on auroras. 

 63. Communicates a letter from Dr. Curtis. 

 63. The adjustaient of census returns. 

 T4. Life and annuity tables. 

 15. International coinage. 

 91. Remarks on the legal value of the dollar. 

 109. The credit of the United States. 



H. W. Elliott. 



91. Habits of the fur-bearing seals, 



F. M. Endlich. 



71. On Mineralogical Systems. 



95. Electrical phenomena in the Rocky Mountains. 



98. Two bricks from the great wall of China. 



98. Specimens of meteoric iron. 



101. Occurrence of pure tellurium. 



E. J. Farquhar. 



42. Remarkable effects of lightning. 



