﻿Penfield 
  and 
  Foote 
  — 
  Bcebli?igite, 
  a 
  neiv 
  Silicate. 
  415 
  

  

  in 
  veins 
  and 
  pockets 
  in 
  the 
  garnet 
  rock, 
  is 
  in 
  places 
  porous 
  and 
  

   full 
  of 
  cavities 
  and 
  these 
  are 
  completely 
  filled 
  at 
  times 
  with 
  

   the 
  masses 
  of 
  rceblingite. 
  The 
  largest 
  mass 
  that 
  was 
  found 
  

   weighed 
  about 
  five 
  pounds 
  and 
  was 
  about 
  the 
  size 
  and 
  shape 
  of 
  

   a 
  cocoanut. 
  

  

  The 
  ore 
  body 
  and 
  the 
  rocks 
  in 
  the 
  mine 
  are 
  greatly 
  shattered 
  

   and 
  show 
  frequent 
  slickensides, 
  and 
  undoubtedly 
  the 
  agencies 
  

   which 
  produced 
  the 
  shattering 
  movements 
  were 
  the 
  ones 
  

   which 
  also 
  produced 
  the 
  conditions 
  necessary 
  for 
  the 
  forma- 
  

   tion 
  of 
  the 
  great 
  variety 
  of 
  minerals 
  observed 
  at 
  this 
  locality. 
  

  

  The 
  method 
  used 
  in 
  analyzing 
  the 
  mineral 
  is 
  as 
  follows 
  : 
  

  

  The 
  mineral 
  was 
  dissolved 
  in 
  nitric 
  acid, 
  and 
  silica 
  removed 
  

   in 
  the 
  ordinary 
  way, 
  substituting 
  nitric 
  for 
  hydrochloric 
  acid, 
  

   so 
  that 
  lead 
  might 
  not 
  remain 
  behind. 
  When 
  heated 
  in 
  the 
  

   air 
  bath 
  at 
  140°, 
  however, 
  some 
  manganese 
  nitrate 
  was 
  decom- 
  

   posed 
  and 
  converted 
  into 
  a 
  higher 
  oxide 
  which 
  was 
  insoluble 
  

   in 
  nitric 
  acid. 
  This 
  was 
  filtered 
  off 
  with 
  the 
  silica, 
  and 
  after 
  

   washing, 
  was 
  dissolved 
  by 
  treatment 
  with 
  hydrochloric 
  acid. 
  

   The 
  nitric 
  and 
  hydrochloric 
  acid 
  filtrates 
  were 
  evaporated 
  to 
  

   dryness 
  separately 
  and 
  a 
  further 
  trace 
  of 
  silica 
  was 
  thus 
  

   removed. 
  Lead 
  was 
  precipitated 
  from 
  the 
  slightly 
  acid 
  solu- 
  

   tion 
  by 
  hydrogen 
  sulphide 
  and 
  determined 
  as 
  sulphate, 
  and 
  

   manganese 
  and 
  calcium 
  were 
  determined 
  by 
  the 
  ordinary 
  

   methods. 
  The 
  small 
  amount 
  of 
  strontium 
  was 
  weighed 
  with 
  

   the 
  calcium 
  as 
  oxide 
  and 
  separated 
  by 
  treatment 
  with 
  amyl 
  

   alcohol. 
  For 
  the 
  determination 
  of 
  sulphur 
  dioxide, 
  separate 
  

   portions 
  were 
  used. 
  The 
  mineral 
  was 
  treated 
  with 
  strong 
  

   bromine 
  water 
  and 
  hydrochloric 
  acid, 
  and 
  after 
  being 
  dissolved 
  

   and 
  standing 
  for 
  some 
  time, 
  the 
  sulphuric 
  acid 
  formed 
  was 
  

   precipitated 
  as 
  BaS0 
  4 
  . 
  The 
  precipitate 
  was 
  impure, 
  contain- 
  

   ing 
  silica 
  and 
  probably 
  some 
  lead 
  sulphate, 
  and 
  it 
  was 
  purified 
  

   in 
  the 
  ordinary 
  way 
  by 
  fusion 
  with 
  sodium 
  carbonate 
  and 
  

   reprecipitation 
  with 
  barium 
  chloride. 
  Water 
  was 
  determined 
  

   directly 
  by 
  means 
  of 
  the 
  closed 
  tube 
  method,* 
  and 
  alkalies 
  by 
  a 
  

   Smith 
  fusion. 
  

  

  At 
  the 
  request 
  of 
  Mr. 
  Nason 
  the 
  authors 
  take. 
  pleasure 
  in 
  

   naming 
  this 
  mineral 
  rceblingite 
  in 
  honor 
  of 
  the 
  celebrated 
  

   engineer, 
  Mr. 
  W. 
  A. 
  Rcebling 
  of 
  Trenton, 
  1ST. 
  J. 
  They 
  also 
  

   take 
  pleasure 
  in 
  expressing 
  their 
  thanks 
  to 
  Mr. 
  F. 
  L. 
  Nason 
  

   and 
  Mr. 
  John 
  A. 
  Manley 
  of 
  New 
  Brunswick, 
  N. 
  J., 
  for 
  the 
  

   pains 
  they 
  have 
  taken 
  in 
  supplying 
  material 
  for 
  this 
  investiga- 
  

   tion. 
  

  

  Mineralogical 
  and 
  Petrographical 
  Laboratory. 
  

  

  Sheffield 
  Scientific 
  School, 
  New 
  Haven, 
  April, 
  1897. 
  

  

  *This 
  Journal, 
  III, 
  xlviii. 
  p. 
  31, 
  1894. 
  

  

  