D.  VAJST  NOSTEAND.  27

Bell  on  Iron  Smelting.
8vo.  Cloth.  $6.03.
CHEMICAL  PHENOMENA  OF  IRON  SMELTING.  An  experimental ­
  and  praetical  examination  of  the  circumstances  which
determine  the  capacity  of  the  Blast  Furnace,  the  Temperature
of  the  Air,  and  the  Proper  Condition  of  the  Materials  to  be
operated  upon.  By  I.  Lowthian  Bell.
u  The  reactions  which  take  place  in  every  foot  of  the  blast-furnace  have
been  investigated,  and  the  nature  of  every  step  in  theprocess,  from  the  introduction
  of  the  raw  material  into  the  furnace  to  the  production  of  the  pig  iron,
has  been  carefully  ascertained,  and  recorded  so  fully  that  any  one  in  the  trade
can  readily  avail  themselves  of  the  knowledge  acquired;  and  wo  have  no  hesitation
  in  saying  that  the  judicious  application  of  such  knowledge  will  do
much  to  faeilitate  the  introduction  of  arrangements  which  will  still  further
economize  fuel,  and  at  the  same  time  permit  of  the  quality  of  the  resulting
metal  being  maintained,  if  not  improved.  The  volume  is  one  which  no  practical
  pig  iron  manufacturer  can  afford  to  be  without  if  he  be  desirous  of  entering ­
  upon  that  competition  which  nowadays  is  essential  to  progress,  and
in  issuing  such  a  work  Mr.  Bell  has  entitled  himsolf  to  the  best  thanks  of
every  member  of  the  trade.”—London  Mining  Journal.

King’s  Notes  on  Steam.
Thirteenth  Edition.
8vo.  Cloth.  $2.00.
LESSONS  AND  PRACTICAL  NOTES  ON  STEAM,  the  Stoam-Engine,
  Propellers,  &e.,  &c.,  for  Young  Engineers,  Students,  and
others.  By  the  late  W.  R.  King,  U.  S.  N.  Revised  by  Chief-Engineer
  J.  W.  King,  U.  fe.  N  avy.
“  This  is  one  of  the  best,  because  eminently  plain  and  practioal  treatises  on
the  Steam  Engine  ever  published.  ’—Philadelphia  Press.
This  is  the  thirteenth  edition  of  a  valuable  work  of  the  late  W.  H.  King,
XJ  s  N.  It  contains  lessons  and  praetical  notes  on  Steam  and  the  Steam  Engine, ­
  Propellers,  etc.  It  is  calculated  to  be  of  great  use  to  young  marine  engineers,
  students,  and  others.  The  text  is  illustrated  and  explamed  by  numerous
  diagrams  and  representations  of  machinery.  -Boston  Daily  Adveriiier.

Text-book  at  the  U.  S.  Naval  Academy,  Annapolis.