Reviews.  5°3 
advice  given  by  the  Bishop  of  Lonsdale  to  those  who  came  to  him  inquiring 
the  way  to  heaven  :  '  Turn  to  the  right,  then  go  straight  forward.'" 
Ueber  die  Isomeration  hdherer  Homologen  des  Aethylens  und  Acetylens. 
Von  I,.  Reuter.    Heidelberg.    1892.    8vo.    Pp.  29. 
On  the  isomeration  of  the  higher  homologues  of  ethylene  and  acetylene. 
This  inaugural  essay  is  dedicated  to  Prof.  Fliickiger. 
Planten  en  Plantenstojfen.    Door  M.  Greshoff.    Batavia.    1891.  Pp.28. 
This  is  a  discourse  on  plants  and  plant  constituents,  delivered  by  Dr.  Gres- 
hoff, at  Batavia,  before  the  Society  for  Natural  History  in  Dutch  India,  and 
which  treats  of  the  importance  of  phyto-chemistry  in  the  broader  sense  of  the 
term. 
The  reception  of  the  following  theses  from  the  FyCole  superieurede  Pharmacie 
de  Paris  is  herewith  acknowledged  : 
Recherches  sur  quelques  Corps  Gras  aborigine  vegUal.  Par  Ernest  Gerard. 
Pp.  74. 
Researches  on  some  fats  of  vegetable  origin,  viz  :  of  stramonium  seed,  oats, 
and  of  two  fungi,  Lactarius  vellereus  and  L.  piperatus. 
Recherches  nouvelles  sur  les  Vins.    Par  Louis  Joseph  Hugounenq.  Pp.32. 
New  researches  on  wines  containing  among  others  processes  for  the  estima- 
tion of  tannin  and  for  the  extraction  and  examination  of  coloring  matters  in 
wine. 
Etude  sur  la  neutralisation  des  Acides  et  des  Bases  par  la  mHhod  des  con- 
ductibilites electriques \    Par  Paul  Alfred  Daniel  Berthelot.    Pp.  45. 
Study  upon  the  neutralization  of  acids  and  bases  by  the  method  of  electric 
conductibilities. 
Contribution  a  V Etude  histologique  des  Lauracees.    Par  B.  Perrot.    Pp.  62. 
.Contribution  to  the  histological  study  of  lauracese  ;  the  structure  of  stems 
and  leaves  has  been  more  particularly  studied. 
Sur  un  nouveau  Corps  gazeux,  le  Pentafluochlorure  de  Phosphore.  Par 
Camille  Poulenc.    Pp.  23. 
On  a  new  gaseous  body,  pentafluochloride  of  phosphorus,  prepared  by  acting 
with  chlorine  upon  trifluoride  of  phosphorus  ;  the  composition  of  the  gas  is 
PF3C12. 
Contribution  a  V Etude  chimique  du  Chloroforme ;  action  des  Sulfur es  de 
Potassium  et  de  Sodium.    Par  Louis  Demont.    Pp.  64. 
Contribution  to  the  chemical  study  of  chloroform  ;  action  of  the  sulphides 
of  potassium  and  of  sodium. 
Detail  Illustrations  of  Yucca  and  Description  of  Agave  Engelmanni.  By 
Win.  Trelease.    8vo.    Pp.  10,  and  25  plates. 
The  Yucca  Moth  and  Yucca  Polination.  By  Chas.  V.  Riley.  8vo.  Pp.  60, 
and  10  plates. 
The  Fruiting  of  Parmelia  molliuscula.  By  Thos.  A.  Williams.  8vo.  Pp.  2, 
and  1  plate. 
These  three  monographs  are  reprints  from  the  third  annual  report  of  the 
Missouri  Botanical  Garden.  The  subject  matter  of  each  is  readily  ascertained 
from  the  title,  but  special  attention  may  be  called  to  the  fact  that  the  first  one 
Aid.  Jour.  Pharm. 
Sept.,  1892. 
