﻿W. 
  P. 
  White 
  — 
  Silicate 
  Specific 
  Heats. 
  19 
  

  

  soon 
  arise 
  from 
  the 
  mere 
  fact 
  that 
  each 
  operation 
  neces- 
  

   sarily 
  involves 
  a 
  possible 
  error 
  of 
  one-half 
  in 
  the 
  last 
  

   place. 
  Hence 
  everything 
  was 
  done 
  with 
  5 
  figures 
  up 
  to 
  

   the 
  final 
  copying 
  into 
  this 
  or 
  the 
  following 
  tables. 
  

  

  

  

  

  Table 
  VI. 
  

  

  

  

  

  

  

  

  Interval 
  Mean 
  

  

  Atomic 
  

  

  Heats. 
  

  

  

  

  

  

  0°-100° 
  

  

  0°-300° 
  

  

  0°-500° 
  

  

  0°-700° 
  

  

  0°-900° 
  

  

  0°-1100° 
  

  

  0°-1300° 
  

  

  0°-1400 
  c 
  

  

  Silica 
  glass 
  

  

  3-708 
  

  

  4-272 
  

  

  4-627 
  

  

  4-870 
  

  

  5-049 
  

  

  

  

  

  Quartz 
  

  

  3-755 
  

  

  4-359 
  

  

  4-784 
  

  

  5-112 
  

  

  5-217 
  

  

  5-308 
  

  

  

  

  Cristobalite 
  

  

  3-784 
  

  

  4-689 
  

  

  4-876 
  

  

  5-042 
  

  

  5163 
  

  

  5-276 
  

  

  5-351 
  

  

  5-388 
  

  

  Anorthite 
  

  

  4-079 
  

  

  4-596 
  

  

  4-926 
  

  

  5-144 
  

  

  5-322 
  

  

  5-472 
  

  

  5-638 
  

  

  5-736 
  

  

  Andesine 
  

  

  4-012 
  

  

  

  4-857 
  

  

  5-086 
  

  

  5-263 
  

  

  

  

  

  Albite 
  

  

  3-960 
  

  

  4-479 
  

  

  4-805 
  

  

  5-030 
  

  

  5-207 
  

  

  5-346 
  

  

  

  

  Micro 
  cline 
  

  

  3-971 
  

  

  4-474 
  

  

  4-801 
  

  

  5031 
  

  

  5-200 
  

  

  5-332 
  

  

  

  

  Microcline 
  

  

  

  

  

  

  

  

  

  

  glass 
  

  

  4073 
  

  

  4-591 
  

  

  4-926 
  

  

  5-160 
  

  

  5-337 
  

  

  5-516 
  

  

  

  

  Pseudo- 
  

  

  

  

  

  

  

  

  

  

  wollastonite 
  

  

  4-290 
  

  

  4-758 
  

  

  5-050 
  

  

  5-256 
  

  

  5-409 
  

  

  5-534 
  

  

  5-646 
  

  

  5-697 
  

  

  Mag. 
  Sil. 
  

  

  

  

  

  

  

  

  

  

  Amphibole 
  

  

  4090 
  

  

  #•624 
  

  

  4-952 
  

  

  5-182 
  

  

  5-354 
  

  

  5-496 
  

  

  

  

  Mag. 
  Sil. 
  

  

  

  

  

  

  

  

  

  

  Pyroxene 
  

  

  4-103 
  

  

  4-647 
  

  

  4-997 
  

  

  

  

  

  0°-1250° 
  

  

  

  Diopside 
  

  

  4-175 
  

  

  4-697 
  

  

  5-021 
  

  

  5-252 
  

  

  5-425 
  

  

  5-560 
  

  

  5-649 
  

  

  

  For 
  quartz 
  and 
  silica 
  glass 
  the 
  values 
  of 
  the 
  interval 
  

   specific 
  heat 
  to 
  100°, 
  300° 
  and 
  500° 
  satisfy 
  the 
  expres- 
  

   sions 
  : 
  

  

  Quartz 
  0-1685 
  + 
  '000194(9 
  - 
  O-OOOOOO110 
  2 
  (4) 
  

  

  Silica 
  glass 
  .0M670 
  + 
  0'000189<9 
  - 
  0"0000001256> 
  2 
  (5) 
  

  

  Table 
  VII. 
  

   Instantaneous 
  ' 
  ' 
  or 
  true 
  Mean 
  Atomic 
  Heats, 
  that 
  is, 
  Heats 
  at 
  different 
  Temperatures. 
  

  

  

  0° 
  

  

  100° 
  

  

  300° 
  

  

  400° 
  

  

  500° 
  

  

  600° 
  

  

  700° 
  

  

  800° 
  

  

  900° 
  

  

  1000° 
  

  

  1100° 
  

  

  1200° 
  

  

  1300° 
  

  

  Silica 
  glass 
  

  

  3-33 
  

  

  4-05 
  

  

  4-95 
  

  

  5-17 
  

  

  5-35 
  

  

  5-48 
  

  

  5-58 
  

  

  5-68 
  

  

  5-75 
  

  

  

  

  

  

  Quartz 
  

  

  3-37 
  

  

  4-1 
  

  

  51 
  

  

  

  5-9 
  

  

  

  5-46 
  

  

  5-58 
  

  

  5-66 
  

  

  5-72 
  

  

  

  

  

  Cristobalite 
  

  

  

  

  

  

  

  5-46 
  

  

  5-55 
  

  

  5-62 
  

  

  5-67 
  

  

  5-72 
  

  

  5-77 
  

  

  5-82 
  

  

  5-86 
  

  

  Anorthite 
  

  

  3-74 
  

  

  4-39 
  

  

  5-22 
  

  

  5-43 
  

  

  5-58 
  

  

  5-69 
  

  

  5-82 
  

  

  5-95 
  

  

  6-04 
  

  

  6-14 
  

  

  6-31 
  

  

  6-54 
  

  

  6-82 
  

  

  Andesine 
  

  

  

  

  

  

  5-53 
  

  

  5-66 
  

  

  5-78 
  

  

  5-89 
  

  

  

  

  

  

  

  Albite 
  

  

  3-61 
  

  

  4-28 
  

  

  510 
  

  

  5-31 
  

  

  5-46 
  

  

  5-59 
  

  

  571 
  

  

  5-83 
  

  

  591 
  

  

  5-97 
  

  

  

  

  

  Microcline 
  

  

  3-64 
  

  

  4-27 
  

  

  509 
  

  

  5-30 
  

  

  5-47 
  

  

  5-61 
  

  

  5-72 
  

  

  5-79 
  

  

  5-86 
  

  

  5-92 
  

  

  

  

  

  Microcline 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  glass 
  

  

  3-73 
  

  

  4-38 
  

  

  5-22 
  

  

  5-44 
  

  

  5-61 
  

  

  5-75 
  

  

  5-85 
  

  

  5-95 
  

  

  611 
  

  

  6-34 
  

  

  

  

  

  Wollastonite 
  

  

  

  

  

  

  

  

  

  

  6-11 
  

  

  

  

  

  

  Pseudo-woll. 
  

  

  3-98 
  

  

  4-58 
  

  

  5-32 
  

  

  5-50 
  

  

  5-65 
  

  

  5-77 
  

  

  5-87 
  

  

  5-95 
  

  

  6-02 
  

  

  610 
  

  

  618 
  

  

  626 
  

  

  633 
  

  

  Diopside 
  

  

  3-82 
  

  

  4-49 
  

  

  5-32 
  

  

  5-52 
  

  

  5-69 
  

  

  5-83 
  

  

  5-94 
  

  

  603 
  

  

  6-10 
  

  

  617 
  

  

  6-24 
  

  

  

  

  Mag. 
  sil. 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  Amphibole 
  

  

  3-73 
  

  

  4-42 
  

  

  5-26 
  

  

  5-46 
  

  

  5-62 
  

  

  5-76 
  

  

  5-87 
  

  

  5-96 
  

  

  604 
  

  

  613 
  

  

  

  

  

  Nernst-Lindemann 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  Formula 
  for 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  Silica 
  glass 
  

  

  

  4-95 
  

  

  

  5-35 
  

  

  

  5-55 
  

  

  

  5-67 
  

  

  5-71 
  

  

  5-75 
  

  

  

  5-80 
  

  

  

  

  

  

  Quartz 
  

  

  at 
  550 
  

  

  6-3 
  

  

  

  

  

  

  

  

  