Mix  the  solution  of  ferric  snlphate  with  M*X»  fill  iif  nalil  and 
gradually  add  it  to  the  sodium  bkarkoffitatie  ((contained  in  a  eaadoe 
l-xxsiIx  x  xxsciz:  sit^.    X:^r  ixxlj  L^i.-  ~xxil  fr^esoeDse 
his  xeixLj  :exs-;i  iiLxxx-  zz-  n:ir_-r  ~ xx  ^  pirrf.  waxer.  and 
let  the  pree^ihafe  subside.   Decant  tht  x^pernatant  liquid  and  treat 
as  before.  Xow  pour  the  washed  precipitate  upon  a  ifilmar.  and  when 
the  excess  of  adhriing  water  has  drained  off  transfer  it  to  a  capsule 
and  mix  it  with  the  lactu-  acid :  tin  add  the  diluted  chlorhjdric  acid- 
warm  gem%-9  and  when  the  precipitate  Haas  dissolved  add  sufficient 
water  to  make  the  solution  weigh  2^085  parts.  To  obtain  the  salt  in 
scales  evaporate  the  solution  geuthr  to  a  syrupy  conscience  and  spread 
it  out  on  plates  of  gta?  to  dinr. 
THERMO-CHEMISrRY  OF  HALOED  SAL1> 
sir  xs  •  .  :  x-apers  the  author,  by  adduding;  the  data  fer 
ficatinw  of  has  general  theory  to  the  case  of  the  double  haloid 
salts,  adds  a  new  chapiter  to  the  researches  on  dbsnmikad  nwiHunirh 
—'zz>::z  xx  lis  x-xz sxxx-x  :::  s:  r;.arj  -?i^„  A  xxxxxlxxx  zhi»:>zj  ox 
s-,"  —  -  xx-xxxxxxs  xxxxs  xhi:  z~  ::t  rorxxoxxxis  r&ii&Kf  ::"  leixif 
fxzxxixc  xxjIsz  xxx  £:~tZ  :ox-xi:ix.es  ::  xx~  xxx»xr:x:xx:  shall  to  zz&zl 
into  areimnt  "Onus,  the  Itasans  of  donation  and  of  diHhor«iliong  not 
onbr  of  the  simpfe  safe  km  vhmt  afe©  of  al  Ate  add.  the  basic,  the 
double,  the  hjdnfted,  and  the  anhydrous  salts  'that  can  posabrj  be 
fermed  under  the  ciicumseances^  must  be  determined  befeiehand.  This 
has  been  done  in  manr  cases  in  the  present  series  of  papers,  and  the 
:  :sxx~xc  xxlxtx : ~«  x-xx -ifzei  :~  xif  x rxxxxix.x  .:  xx  •  ~ ~  - -  ~:z±l.  is ix 
xhx  xxxxx"  ::    ~-  xv.  xxx : rvxxi  ilzx*.! 1~  z'~lzx-^z  zz  xxx  ixxixxx 
Z*o/,  xh/x<7,vx,/.     Ixxzzsx  x&xix  xxxxxlj  sxi-^  xxx  zxxxrx- 
of  the  investigation.  Ike  second  gives  the  thermal  data  fer  doable 
silx-  ixrxiex  :x  xixxxxxr^.  :x  xoxsssxxxxx  :x  ::  :oxL  xxxixxd  ~ ixx  :mt  xx 
two  of  the  three  Imkgens,  eM^iin^  ^o>unine.  iodine,  or  with  their 
xxul.-^xx.  rjixxxcxix.  S:xxx  ixxxxxsxix^:  Xixxxi  x-lizs  lt~  xxxexx  XZXZZZZiZ 
xxx  ~xx'xxs~x~x  x cjsx :til  zzi  xxxixxxxti-  :nxxixxs  ::  sxxx  s£xs.  Thus. 
:ix  xxx:  ::  :i:xxxhxixxxx  xxixx  xlx  sixxxLx  sxlx^  xs  virr  sxxiJi  xxszerx 
when  the  ioowle  fe  one  compaimonix.  ^hm  ifc  fax.  ire«i™d  fimie 
;r_   ~   Xj'XXXX.  IX  X      XT  XXX  SIXX'r  IS  XX_XT  X^SfXXrX^'^-X  XX  XXX  XTXXJfX  1 XXXI- 
