Am.  Jour.  Pharm.  \ 
March,  1904.  J 
Pharmaceutical  Meeting. 
him  how  to  avoid,  many  of  the  difficulties  that  arise  in  everyday 
practice,  while,  as  noted  before,  to  the  pharmacist  or  the  teacher 
this  book  should  be  an  almost  inexhaustible  fund  of  ideas  and  sug- 
gestions. 
The  book  throughout  bears  evidence  of  the  originality  and  indi- 
viduality of  Mr.  Ince,  and  this  fact  alone  should  recommend  it  to  all 
that  have  seen  or  become  familiar  with  any  of  his  interesting,  and 
always  sprightly,  contributions  to  pharmaceutical  literature. 
M.  I.  WlLBERT. 
PHARMACEUTICAL  MEETING. 
The  fifth  of  the  Pharmaceutical  Meetings  of  the  Philadelphia 
College  of  Pharmacy  of  the  present  series  was  held  on  Tuesday, 
February  16th,  at  3  o'clock.  Mr.  Mahlon  N.  Kline,  chairman  of 
the  Board  of  Trustees,  presided.  In  opening  the  meeting  Mr.  Kline 
remarked  that  the  papers  to  be  presented  would  be  of  great  interest 
to  Philadelphians,  as  upwards  of  $25,000,000  are  being  spent  to 
secure  a  pure  water  supply  for  this  city. 
The  first  speaker  on  the  programme  was  W.  E.  Ridenour,  a 
specialist  in  the  chemical  analysis  of  water,  who  read  a  paper  on 
the  "Technical  Analysis  of  Water."    (See  page  121.) 
In  answer  to  a  question  by  Mr.  E.  M.  Boring,  Mr.  Ridenour  stated 
that  it  required  about  three  days  to  complete  an  analysis  of  water, 
but  that  usually  four  analyses  were  conducted  at  the  same  time ;  and 
in  reply  to  Prof.  C.  B.  Lowe  he  stated  that  while  a  quart  of  water 
was  sufficient  for  analysis,  he  preferred  to  have  a  gallon  submitted. 
Mr.  Ridenour  said  in  addition  that  the  following  is  the  scheme  of 
analysis,  used  by  the  chemist  of  the  Northwestern  Railroad,  for  the 
separation  of  the  scale-forming  constituents  from  the  non-scaling 
matter : 
Five  hundred  cubic  centimetres  of  water  is  evaporated  to  dryness 
and  dried  to  a  constant  weight  at  ioo°  C.  in  an  air  bath.  The  residue 
is  exhausted  with  66  per  cent,  solution  of  96  per  cent,  alcohol.  This 
gives  a  residue  containing  CaC03,  MgC03,  CaS04,  Si02,  and  a  solu- 
tion which  contains  the  soluble  salts  of  calcium,  magnesium  and 
sodium. 
He  had  not  had  time  to  test  this  method  in  comparison  with  the 
scheme  given  in  his  paper,  but  said  that  it  was  a  very  useful  method 
