Miscellaneous Intelligence. 505 



during 1874; the distillation of zinc-silver alloy; silver-lead 



smelting at the Winnamuck Smelting Works; the Germunia 

 Refining and desilverization works, Utah ; the < 



operation of a slag hearth ; the Rocky Mountain Coal and Coke, 

 condensed from a paper by Mr. Blodgett Britton ; separation c " 



mining, by Amos Bowman, and his detailed observations will be 

 read with profit by all who are interested in the genesis of veins 

 however they may differ from some of the theoretical views of the 

 author. This is followed by a history of the relative values of 

 gold and silver, by R. W. Raymond, and another on improve- 

 ments in mining and milling machinery in the Pacific States, by 

 William P. Blake, with a description of the remarkable Silver 

 Mill of the Consolidated Virginia on the " Big Bonanza " of the 

 Comstock Lode in Nevada, and miscellaneous statistics. 



We regret to state that unless some new action is had on the 

 part of the General Government this is the last of the valuable 

 series of Reports on the mineral resources of the United States 

 which will appear. 



3. The National Academy of Sciences held its regular annual 

 meeting on April 18 to 21, at Washington City. The following 

 are the titles of the papers read : 



The Character o 



Contributions to Meteorology; by E. Loomis. 



A conjectural restoration of a pueblo of the Mound Builders ; by L. H. Morgi 

 _ The Geological evidence on the question of the cause of the cold of the Ice I 

 riod; by J. S. Newberry. 



On the history of the Problem of the Tangencies ; by B. Alvord. 



On the theory of Magic Squares; by F. A. P. Barnard. 



On the progress of a Magnetic Survey of the United States, at the charge of t 

 Bache Fund of the Academy; by J. E. Hilgard. 



Results of Experiments on Contact-resistance ; by Wm. A. Norton. 



On the imperfections of the present system of Chemical Nomenclature ; by 



The Age of Mountains as determined by degradation; by J. W. Po-well. 

 Biographical Memoir of Joseph Winlock, late Director of the Harvard Ob8er\ 

 tory, Member of the Academy; by Joseph Levering. 

 On the Geological and Physical structure of the Black HiUs ; by Henry Newtc 

 Memoir of Caroline ffersehel, by Mrs. Jons Heksche 



and mvestigator in astronomy ciosea in 1822 with the death of 

 her illustrious brother, William Herschel, with whom she was so 



