314 
Reviews. 
Am.  Jour.  Pharm. 
June,  1894. 
process  and  its  more  recent  modifications,  is  quite  satisfactory.  We  do  not  find 
anything,  however,  with  regard  to  the  recently' proposed  methods  for  the  elec- 
trolytic preparation  of  caustic  soda.  It  is  true  that  these  methods  have  hardly 
passed  beyond  the  experimental  stage  as  yet,  but  the  chemical  journals  have  for 
the  past  year  or  two  contained  abundant  accounts  of  them.  Under  potassium 
chlorate,  however,  we  find  a  recent  electrolytic  method,  now  in  operation  in 
Switzerland,  described.  A  comparison  of  the  hydrometer  scales  in  current  use 
is  appended.  The  work  forms  a  satisfactory  reference  book,  moreover,  in  that 
it  refers  frequently  to  the  original  sources  of  information  in  journal  literature. 
S.  P.  S. 
Chemisch-technische  Specialitdten  und  Geheimnisse  mit  Angabe  ihrer  Zusam- 
mensetzung  nach  den  bewdhrtesten  Chemikem,  von  C.  F.  Capaun-Karlowa, 
Apotheker,  u.  s.  w.  Dritte  vollstandig  umgearbeitete,  vermehrte  und  verbes- 
serte  Auflage.    Wien  :  A.  Hartleben's  Verlag.    252  Seiten. 
Technical-chemical  specialties  and  secrets,  with  a  statement  of  their  compo- 
sition according  to  chemists  of  authority.  By  C.  F.  Capaun-Karlowa,  Apothe- 
cary, etc.  Third,  completely  re-written,  enlarged  and  improved  edition. 
Vienna:  A.  Hartleben's  Publishing  House.    Pp.  252. 
This  work  is  like  the  volumes  of  chemical  recipes  and  secret  preparations  that 
appear  from  time  to  time.  It  is  alphabetically  arranged,  and  includes  such 
subjects  as  varnishes  of  all  kinds,  cements,  alloys,  flavoring  essences,  explo- 
sive mixtures,  inks  and  similar  preparations. 
Such  works  have  a  rather  restricted  value,  as  the  local  conditions  and  names 
of  these  special  preparations  vary  very  greatly,  and  they  rapidly  pass  out  of  use 
and  are  replaced  by  fresh  novelties  and  patented  articles. 
The  work  has  been  brought  down  to  date,  and  probably  has  value  as  a  conve- 
nient reference  book,  fitted  to  the  German  conditions  of  to-day.        S.  P.  S. 
Semi- Annual  Report  of  Schimmel  &  Co.  Leipzig  and  New  York.  April, 
1894.  This  pamphlet  contains  the  statistics,  prices  and  other  commercial  infor- 
mation in  regard  to  essential  oils,  and  also  a  fair  amount  of  results  of  original 
research.  A  number  of  new  oils  have  been  prepared  and  examined  by  the 
firm;  notably,  those  from  mignonette  root,  golden  rod,  red  cedar  and  grape  fruit 
or  shaddock. 
Analyse  bacteriologique  et  chimique  des  eaux.  Par  A.  Denseyer.  Brussels, 
1894. 
Bacteriological  and  chemical  analysis  of  water. 
Les  peptones :  leur  composition,  leur  analyse.  Par  A.  Denseyer.  Antwerp, 
1894. 
Peptones  :  their  composition  and  analysis. 
Vierteljahresschrift  iiber  die  Fortschritte  auf  dem  Gebiete  der  Chemie  der 
Nahrungs-  und  Genussmittel.  Achter  Jahrgang.  Viertes  Heft  (1893). 
Berlin,  1894.    Verlag  von  Julius  Springer. 
The  Oils  and  Oleoresins  of  the  U.  S.  Pharmacopoeia,  i8go.  A  tabular  state- 
ment compiled  by  Albert  N.  Doerschuk,  Ph.G. 
This  table  is  printed  on  one  sheet  of  heavy  paper,  11  x  22,  and  contains  much 
valuable  information.  Copies  may  be  obtained  at  a  nominal  price  by  ad- 
dressing Dr.  H.  M.  Whelpley,  care  of  Myers  Brothers,  Druggists,  St.  Louis,  Mo. 
