48 INDEX TO CONTRIBUTORS. 



B. Peirce. 



PAGE 



31. The heat of the Sun. 



74. Theories of the nature of comets' tails. 



C. S. Peirce. 



35. Appearance of Encke's comet as seen at H. C. Obs. 



63. Stellar photometry. 



68. Geographical distribution of rainfall auv^ illiteracy. 



88. On logical algebra. 



94. On quaternions. 



97. Hypotheses in reference to space. 



Prof. Porter (of" Belfast, Ireland). 



54. Recent explorations in Syria. 



J. W. Powell. 



48. Remarks on the aurora. 



48-51. Geology of the valley of the Colorado. 



, 96. Mythology of the Numas. 



99. Remarks on volcanic phenom. in Arizona and Nevada. 



102. Remarks on volcanic action. 



104. Genesis and demonology of the Numas. 



Mr. Ramsey (of Nova Scotia). 



64. On the tides of the Bay of Fundy. 



Lieut. C. W. Raymond (TJ. S. Army). 

 22. Results of travels in Alaska. 



B. F. Sands 



28. Communicates a paper by Prof. A. Hall. 



J. H. Saville. 



51. New Japanese coinage. 



O. Stone. 



62. Errors of a provisory catalogue of stars. 



W. T. Sherman. 



63. Remarks on a visit to Egypt. 



65. Remarks on travels in Turkey and the Caucasus. 



W. B. Taylor. 



27. The nature and origin of force. 

 43-45. The aurora. 



