﻿CONTENTS 
  

  

  Page 
  

  

  Art. 
  XXVI. 
  — 
  Explosive 
  effect 
  of 
  Electrical 
  Discharges 
  ; 
  by 
  

   J. 
  Tkoavbridge, 
  T. 
  C. 
  McKay 
  and 
  J. 
  C. 
  Howe. 
  (With 
  

   Plate 
  V) 
  239 
  

  

  XXVII. 
  — 
  Experiments 
  relative 
  to 
  the 
  Constitution 
  of 
  Pec- 
  

   tolite, 
  Pyrophyllite, 
  Calamine, 
  and 
  Analcite; 
  ^by 
  F. 
  W. 
  

   Clarke 
  and 
  G. 
  Steiger, 
  245 
  

  

  XXVIII. 
  — 
  Color-vision 
  and 
  the' 
  Flicker 
  Photometer; 
  by 
  

  

  O. 
  N. 
  Rood 
  258 
  

  

  XXIX. 
  — 
  lodometric 
  Determination 
  of 
  Gold; 
  by 
  F. 
  A. 
  Gooch 
  

  

  and 
  F. 
  H. 
  Morley 
  _ 
  261 
  

  

  XXX. 
  — 
  Mineralogical 
  Structure 
  and 
  Chemical 
  Composition 
  

  

  of 
  the 
  Trap 
  of 
  Rocky 
  Hill, 
  N. 
  J. 
  ; 
  by 
  A. 
  H. 
  Phillips, 
  267 
  

  

  XXXI. 
  — 
  Analyses 
  of 
  Italian 
  Volcanic 
  Rocks; 
  by 
  H. 
  S. 
  

  

  Washington 
  _ 
  ■ 
  286 
  

  

  XXXn. 
  — 
  Mineralogical 
  Notes: 
  Melonite 
  (?), 
  Coloradoite, 
  

  

  Petzite, 
  Hessite 
  ; 
  by 
  W. 
  F. 
  Hillebrand 
  295 
  

  

  XXXni.— 
  Epidote 
  and 
  Garnet 
  from 
  Idaho; 
  by 
  C. 
  Palache 
  299 
  

  

  XXXIV. 
  — 
  Thermoelectricity 
  in 
  Certain 
  Metals 
  ; 
  by 
  L. 
  Hol- 
  

  

  BORN 
  and 
  A. 
  L, 
  Day 
  

  

  303 
  

  

  SCIENTIFIC 
  INTELLIGENCE. 
  

  

  Botany 
  — 
  Cycado6.]ices, 
  G. 
  R. 
  AVieland: 
  Hepatica? 
  and 
  Aiithocerales 
  of 
  Cali- 
  

   fornia, 
  M. 
  A. 
  HoAYE, 
  309. 
  — 
  California 
  Hypogiieous 
  Fungi, 
  H. 
  AV. 
  Harkness, 
  

   310. 
  

  

  Miscellaneous 
  Scientific 
  Intelligence 
  — 
  American 
  Association 
  for 
  the 
  Advancement 
  

   of 
  Science, 
  311, 
  

  

  Obituary— 
  Fr 
  of 
  essor 
  Robert 
  Wiliielm 
  Bunsex: 
  Sir 
  Edavard 
  Fraxki.wo: 
  Du. 
  

   Daniel 
  Garrison 
  Brinton, 
  318. 
  

  

  