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EDITORIAL. 
The  new  Tribune  Building,  CHtCAGO. — Some  one  has  politely  sent  us 
an  engraving  of  this  fine  building,  and  a  printed  description  of  the  struc- 
ture and  its  interior  arrrngements.  Our  space  does  not  permit  us  to  more 
than  acknowledge  its  reception. 
A  Manual  of  Chemistry,  theoretical  and  practical,  by  George  Fownes, 
F.R.S.,  &c.  From  the  tenth  revised  and  corrected  English  edition. 
Edited  by  Robert  Bridges,  M.D.,  Prof,  of  Chemistry  in  the  Phila- 
delphia College  of  Pharmacy.  With  197  illustrations.  Phila. :  H.  C. 
Lea,  1869:  pp.  857,  12mo. 
It  is  a  subject  of  general  satisfaction  among  a  large  number  of  chemi- 
cal readers,  teachers,  and  students,  that  this  standard  treatise  has  at 
last  received  the  revision  it  has  so  long  needed,  and  that  teachers  using 
it  as  a  text  book  can  refer  to  it  as  up  to  the  time. 
Among  the  new  matter  the  new  views  in  relation  to  heat  and  light  are 
fully  noticed,  especially  as  regards  the  development  of  heat  by  mechanical 
motion,  and  the  discoveries  incident  to  spectroscopic  studies. 
The  new  views  regarding  nomenclature  which  now  obtain  among  con- 
tinental chemists  are  applied  to  the  oxides.  Ozone  is  enlarged  upon,  and 
the  occlusion  of  hydrogen  noted,  but  the  edition  was  printed  before  Prof. 
Graham's  later  views  on  the  metallic  nature  of  hydrogen  were  published. 
Dialysis  and  osmose  are  also  fully  noticed.  Carbon  follows  hydrogen 
and  nitrogen  with  the  oxygen  and  hydrogen  compounds.  Sulphur,  sele- 
nium, tellurium  in  a  group  are  followed  by  boron,  silicon  and  phosphorus. 
The  new  views  in  relation  to  equivalent  numbers,  atoms  and  notation 
are  fully  discussed,  and  their  bearing  on  the  subjects  following,  require 
close  study  by  all  who  have  not  been  keeping  up  with  the  progress  of 
chemical  science  since  the  last  edition  of  Fownes'  was  published.  The 
classification  of  metals  according  to  their  atomicity  into  six  classes, 
called  monad,  dryad,  triad,  tetrad,  pentad,  and  hexad,  each  of  which  in- 
cludes two  or  more  groups,  is  one  of  the  novel  features. 
The  organic  bodies  are  arranged  according  to  their  composition,  the 
organic  series  of  carbon  and  hydrogen  ranging  first.  They  consist  of  12 
series  and  are  far  too  complex  to  present  a  view  of  them  in  this  notice. 
These  are  followed  by  the  alcohols  and  ethers  of  modern  chemistry ;  then 
come  the  organic  or  carbon  acids ;  the  aldehydes,  and  the  ketones,  a 
class  of  bodies  derivable  from  the  aldehydes. 
Organic  compounds  containing  nitrogen  follow  these,  including  the 
cyanogen  and  uric  acid  compounds  ;  then  the  compound  ammonias  or 
amines,  or  artificial  alkaloids,  then  the  natural  alkaloids.  The  metallic 
organic  bases,  the  amides,  and  the  unclassed  organic  bodies  largely 
derived  from  the  animal  kingdom. 
It  will  require  increased  attention  on  the  part  of  students  to  follow 
Fownes  in  the  new  edition,  for  not  only  is  it  much  extended,  but  much  of 
it  has  been  radically  changed  as  regards  position  and  notation. 
