Am.  Jour.  Pbarm. 
July,  1897. 
Reviews. 
377 
This  large  bulletin  of  342  pages  and  42  plates  is  full  of  interesting  matter 
relating  to  botany. 
The  following  are  the  contents  : 
"Contributions  to  a  Knowledge  of  the  Lichens  of  Minnesota."  II.  "Lichens 
of  Minneapolis  and  Vicinity."    By  Bruce  Fink. 
"A  Rearrangement  of  the  North  American  Hypomycetes."  By  Roscoe 
Pound  and  Frederic  E-  Clements. 
"On  Some  Mosses  at  High  Altitudes."    By  J.  M.  Holzinger. 
"The  Forces  Determining  the  Position  of  Dorsiventral  Leaves."  By  R.  N. 
Day. 
"  On  the  Genus  Coscinodon  in  Minnesota."    By  J.  M.  Holzinger. 
"  Observations  on  the  Ferns  and  Flowering  Plants  of  the  Hawaiian  Islands." 
By  A.  A.  Heller. 
"  The  Phenomena  of  Symbiosis."    By  Albert  Schneider. 
"  Observations  on  the  Distribution  of  Plants  Along  the  Shore  at  Lake  of  the 
Woods."    By  Conway  MacMillan. 
"  The  Alkaloids  of  Veratrum."    By  George  B.  Frankforter. 
The  last  article  is  given  in  abstract  on  page  372  of  this  Journae. 
A  Series  of  Papers  on  the  Origin  and  Chemicae  Composition  oe 
PetroeEUM.  Read  before  the  American  Philosophical  Society,  February  5, 
1897. 
This  interesting  series  has  been   reprinted   from  the  Proceedings  of  the 
Society,  and  bound  together,  so  as  to  make  a  compact  pamphlet  for  reference. 
The  following  are  the  subjects  and  authors  : 
"  The  Genesis  and  Chemical  Relations  of  Petroleum  and  Natural  Gas."  By 
Samuel  P.  Sadtler,  Ph.D. 
"  On  the  Nature  and  Origin  of  Petroleum."    By  S.  F.  Peckham. 
"  A  Suggestion  as  to  the  Origin  of  Pennsylvania  Petroleum."  By  David  T. 
Day. 
"On  the  Genesis  of  Natural  Gas  and  Petroleum."    By  Francis  C.  Phillips. 
"  On  the  Occurrence  of  Petroleum  in  the  Cavities  of  Fossils."    By  Francis  C. 
Phillips. 
"  On  the  Composition  of  American  Petroleum."    By  Charles   F.  Mabery. 
The  discussion  which  followed  the  reading  of  these  papers  is  also  included  in 
the  pamphlet. 
A  Review  oe  Recent  Synthetic  Work  in  the  Ceass  of  Carbohy- 
drates.   By  Helen  Abbott  Michael. 
This  is  a  lecture  delivered  before  the  Franklin  Institute,  and  reprinted  from 
the  Institute's  Journal.  It  is  a  valuable  summary  of  the  present  knowledge  of 
the  sugar  group. 
Sur  EE  Dosage  de  Ea  Cafeine.  Thesis  presented  to  the  Ecole  Superieure 
de  Pharmacie  de  Paris.  By  Eugene  Tassilly.  The  author  has  examined  some 
of  the  methods  already  proposed, and  offered  one  which  he  thinks  possesses  the 
advantages  of  all  the  earlier  processes,  and,  at  the  same  time,  avoids  their  dis- 
advantages. A  summary  of  the  literature  on  the  subject  is  given  from  1872  to 
the  present. 
QUEEQUES  OXYDES  DOUBEES  CRISTAEEISES  ObTENUS  A  HAUTE  TEMPERA- 
