THE 
AMERICAN  JOURNAL  OF  PHARMACY. 
JANUARY,  1871. 
CARRE'S  APPARATUS  FOR  MAKING  ICE. 
By  The  Editor. 
In  the  March  number  of  this  Journal  for  1870,  we  gave  an  account 
of  this  machine  without  the  ability  to  illustrate  it  by  engravings. 
Since  then  Mr.  Bujac  has  had  drawings  made  and  engraved,  which 
enables  us  to  recur  to  the  subject  so  far  as  to  present  the  engravings 
to  our  readers  with  a  repetition  of  the  description,  rendered  necessary 
by  the  absence  of  the  letters  of  reference  to  the  several  parts  in  our 
former  notice.  By  comparing  the  letters  in  figures  1  and  2  with 
those  in  the  vertical  view,  fig.  3,  the  reader  will  readily  get  a  correct 
idea  of  the  relation  of  the  parts  of  the  apparatus.  Fig.  1  is  an  end 
view,  in  section,  the  observer  looking  from  the  right  hand  end  of  the 
machine,  as  seen  in  fig.  2  toward  the  left,  so  as  to  see  under  the  plat- 
form which  supports  the  freezing  cistern,  and  which  is  supported  on 
four  iron  columns.  The  really  scientific  character  of  this  machine, 
and  the  beautiful  manner  in  irhich  it  illustrates  the  practical  applica- 
tion of  the  laws  of  latent  heat,  is  our  excuse  for  again  occupying 
space  with  it ;  besides,  as  it  is  quite  possible  to  construct  a  miniature 
arrangement  by  which  cold  could  be  commanded  at  pleasure,  some 
application  of  the  principle  may  hereafter  be  made  subservient  to  the 
uses  of  the  pharmaceutist. 
"Mr.  Carre's  invention  consists  in  the  use  of  aminoniacal  gas,  liquefied  by 
pressure,  as  his  agent  for  freezing  water,  which  it  does  by  abstracting  and 
rendering  latent  the  heat  necessary  to  the  liquid  condition  of  the  water.  The 
manner  of  using  the  aqua  atnmonise  to  effect  this  purpose  is  exceedingly  in- 
genious, and  apparently  paradoxical,  inasmuch  as  '  heat  is  applied  to  produce 
COLD  ; '  '  FIRE  to  MAKE  ICE  ; '  and  this  is  one  of  the  claims  of  originality  made  by 
the  patentee,  who  also  claims  'the  application  of  the  power  of  absorption 
DUE   TO   mutual   AFFINITY  AS  A  MEANS  OF   PRODUCING  VACUUM,  VOLATILIZATION, 
