EDITORIAL. 
479 
represent  that  work,  the  matter  being  arranged  differently;  but  chiefly 
because  it  gives  us  an  American  journal  in  capable  hands  entirely  devot- 
ed to  chemical  science.  During  the  current  year  the  editors  will  extract 
largely  from  the  Chemical  News  as  a  duty  to  the  transferred  subscribers, 
after  which  the  American  Chemist  will  be  entirely  independent.  The 
enterprise  has  our  best  wishes  for  its  success. 
The  Half-yearly  Abstract  of  the  Medical  Sciences,  being  a  digest  of 
British  and  Continental  medicine  and  the  collateral  sciences.  Edited 
by  William  Dormett  Stone,  M.D.  Vol.  LI.  July,  1870.  Philada. : 
Henry  C.  Lea;  pp.  296  octavo.  $2.50  a  year  in  advance.  Single  num- 
bers, 
Braithwaite's  Retrospect  of  Practical  Medicine  and  Surgery.  Part  LXI^ 
July,  uniform  American  edition.  New  York:  W.  A.  Townsend  and 
Adams  publishers,  1870.  $2.50  a  year,  in  advance  ;  or  $1.50  per  single 
part. 
Half- Yearly  Compendium  of  Medical  Science;  a  synopsis  of  American 
and  Foreign  literature  of  medicine,  surgery  and  the  collateral 
sciences,  for  six  months.  Edited  by  S.  W,  Butler,  M.D.,  D.  G.  Brin- 
ton,  M.D.,  and  G.  H.  Napheys,  M.D.  Part  VI.  July,  1870.  Philada.: 
S.  W.  Butler,  M.D.,  115  South  7th  St.  $3.00  a  year,  in  advance; 
$2.00  for  single  numbers. 
These  semi-annuals  all  contain  a  great  variety  of  valuable  papers  from 
the  journals  of  Europe  and  the  United  States,  relating  mainly  to' medicine 
and  surgery.  The  two  first  are  reprints,  the  last  an  original  compilation  of 
the  same  character.  They  are  too  well  known  in  medical  circles  to  need 
even  this  explanation.  Thdy  are  all  sent  post  paid  for  the  subscription 
price. 
Twenty -seventh  Annual  Report  of  the  Managers  of  the  State  Lunatic 
Asylum  for  the  year  1869.    Albany,  1870  :  pp.  92,  octavo. 
The  Proof  Sheet ;  a  , bi-monthly  typographical  magazine  issued  by  Collins 
&  McLeester,  type  founders,  Philada.  Pp.  20,  royal  octavo. 
The  Proof  Sheet  is  a  happy  way  of  showing  neat  printing  from  beauti- 
ful type  on  superb  paper,  and  to  those  connected  with  the  press  or  who 
have  to  do  with  selecting  type  for  labels  this  bi-monthly  will  prove  a  use- 
ful visitant.    Price  $1  per  annum. 
Artificial  Refrigerators. — Carre's  and  Mignon  and  Rouat's  continuous 
freezing  apparatus,  for  the  production  of  ice  by  the  direct  action  of  heat. 
Philada.,  1870.    By  M.  J.  Bujac  of  New  York.  17  Broad  St. 
This  is  a  pamphlet  of  seventeen  pages  with  three  illustrations,  intended 
to  explain  M.  Carre'§  apparatus  described  in  this  journal  in  March  last- 
