INDEX TO CONTRIBUTORS. 389 



Mr. A. C. Ross (of Zanesville, Ohio). 



PAGE 



39. On latent impressions on polished glass plates. 



S. Shellabarger. 



105. Remarks on water-spouts and cloud-bursts. 



C. A. SCHOTT. 



38. Remarks on the time reckoning in Alaska. 

 TT. Remarks on the rigidity of the earth's crust. 

 200. On a new eye-piece for observing personal equations. 



Rev. Dr. G. W. Shields (of Princeton, N. J.). 

 15. On the present state of the sciences. 



A. N. Skinner. 



25. Remarks on vision, the microscope, etc. 



Prof. J. Lawrence Smith (of Louisville, Ky.). 

 190. Remarks on aerolites. 



A. R'. Spofpord. 



42. On proposed reforms in spelling the English language. 



O. Stone. 



22. On the correction of a comet's orbit. 



30. Remarks on a proposed reformation of the calendar. 



Prof. Dr. J. J. Sylvester (of Baltimore, Md.). 

 95. On the theory of invariants. 



Mr. G. F. Talbot (of ). 



105. Remarks on waterspouts and cloud-bursts. 



G. Taylor. 



196. Remarks commemorative of Professor Henry, 



W. 13. Taylor. 



25. Remarks on vision, the microscope, etc. 



26. Remarks on the distribution of mammals. 



2t. Remarks on Croll's theory of the Glacial epoch. 



30. Remarks on a desirable change in the calendar. [1079. 



38. Remarks on the calendar proposed by Omar CheVam in 



43. Remarks on Croll's astronomical theory of glacial cli- 



mate. ' [theories of climate. 



46. Remarks on the astronomical and the geographical 



