186 
EDITORIAL. 
competent  pharmaceutical  chemist  on  the  spot,  as  to  the  proportion  and 
quality  the  resin  afforded  by  the  male  and  female  hemp  plants  to  the 
Kentucky  and  Missouri  hemp  regions.  If  Mr.  Lewis  Diehl,  of  Louisville, 
Ky.,  would  undertake  this  and  report  his  results  to  the  Association  next 
September,  he  would  greatly  aid  in  getting  a  solution  of  the  question, 
whether  the  development  of  hemp  resin  is  influenced  by  the  gender  of 
the  plant,  or  whether  it  is  soil,  climate,  or  other  circumstances.  We 
may  state  that  the  hemp  tops  and  leaves  of  our  experiment  (see  Amer. 
Jour.  Pharm.,  1865,  p.  23)  above  alluded  to,  were  collected  in  August, 
1864,  from  seed-bearing  plants  six  feet  high,  grown  near  Coates  and  Broad 
Streets,  in  Philadelphia.  Dr.  Wood,  alluding  to  the  supply  for  pharma- 
ceutists,  says,  "  the  male  seeding  plants  in  Kentucky,  after  they  have 
shed  their  pollen,  are  worthless.  It  was  with  such  plants  the  experi- 
ments were  instituted.  A  considerable  supply  of  them  might  be  obtained, 
so  Mr.  Hamilton  writes  me,  for  little  more  than  the  expense  of  gathering 
them,  or  if  the  demand  should  exceed  the  amount  of  such  male  plants 
the  leaves  of  the  female  plants  when  ready  to  cut  for  the  fibre  might  be 
obtained  on  the  same  terms. 
Tlie  Cell  Doctrine  :  its  history  and  present  state.    For  the  use  of  students 
in  medicine  and  dentistry.    Also  a  copious  biography  of  the  subject. 
By  James  Tyson,  M.D.,  Lecturer  on  Microscopy  in  the  University  of 
Pennsylvania,  &c.,  &c.    With  a  colored  plate  and  other  illustrations. 
Philad. ;  Lindsay  &  Blakiston,  1870.    Pp.  150,  12mo. 
This  volume  has  been  the  result  of  much  research  into  the  literature  of 
the  subject,  guided  by  an  earnest  desire  on  the  part  of  the  author  to 
present  the  fruits  of  his  labor  in  a  form  adapted  to  greatly  aid  the  student 
of  physiology  and  pathology    "  He  has  sought  to  obtain  a  continuous 
history  of  the*  cell  doctrine 'up  to  its  present  state,  without  embarrassing 
his  pages  with  a  large  number  of  isolated  facts.    He  has  attempted,  how- 
ever, to  secure  a  completeness,  and  to  make  the  work  useful  to  physicians 
and  others  engaged  in  research  by  careful  references  and  the  addition  of 
a  bibliography  which  he  has  sought  to  make  accurate  and  extended." 
A  glance  over  the  work  will  convince  the  reader  that  the  author  has 
fulfilled  his  prefatory  promise,  and  has  produced  a  condensed  historical 
account  of  the  early  and  later  observations  and  speculations  or  theories 
which  have  marked  the  gradual  development  of  the  present  idea  of  the 
growth  of  organic  bodies  from  cell  nucleoli,  as  exposed  by  the  microscope. 
It  is  curious  to  follow  the  chain  from  Galen  to  Schleiden  and  Schwann, 
and  from  these  to  the  present  time,  when  the  more  perfect  views  of  Hux- 
ley, Yirchow  and  Beale  prevail  among  physiologists.  The  book  is  beauti- 
fully printed  on  excellent  paper,  is  neatly  bound,  and  reflects  credit  on 
all  concerned.    Price,  two  dollars. 
Chemistry  :  General^  Medical  and  Pharmaceutical,  including  the  Che- 
mistry of  the  British  Pharmacopoeia.    By  John  Attfield,  Ph.D.,  F.O.S 
