Am'oJc°tu,ri8>79-rm'}  American  Pharmaceutical  Association,  509 
Estimation  of  the  Aldehyd. — Into  a  25  or  50  cc.  flask  run  10  cc.  of 
the  spirit,  and  add  10  cc.  of  peroxide  of  hydrogen,  and  let  it  stand 
two  or  three  hours  ;  by  this  time  the  aldehyd  will  have  become  con- 
verted into  acetic  acid,  and  may  be  estimated  by  decinormal  alkali  \ 
the  amount  thus  determined,  less  the  number  of  cc.  required  by  the 
free  acid  previously  determined,  multiplied  by  '0044  will  give  the 
amount  of  aldehyd. 
Estimation  of  Alcohol  and  Water. — The  alcohol  is  estimated  by  the 
specific  gravity,  and  the  water  by  difference. 
The  foregoing  scheme  of  analysis  probably  may  look  formidable  in 
the  eyes  of  very  practical  people.  It  certainly  involves  some  nicety  of 
selection  of  materials,  as  to  purity,  but  otherwise  it  is  not  difficult. 
I  append  the  statement  of  analysis  of  four  samples  of  spirit  of  nitrous 
ether,  obtained  from  different  sources  and  represented  as  the  "  best." 
No.  1.  No.  2.  No  3.  No.  4. 
Water,           .  .          I0'55  14*12  16*17  I5'49 
Aldehyd,    .  .           •         '75  '2I  'co  * 
Alcohol,          .  .           87*5  85*2  82*60  83-6 
Acetic  Acid,  .           .        *i6  '03  *i8  *i6 
Nitrous  Acid,  .  .              -29  -27  -69  *6& 
Nitrite  of  Ethyl,  .                   '75  #I7  'IO  *°7 
lOO'OO 
The  nice  gradation  of  quality  here  exhibited,  without  any  design,  is- 
very  remarkable. — Phar.  four,  and  Trans. ,  July  19,  1879. 
THE  TWENTY-SEVENTH  ANNUAL  MEETING  OF  THE 
AMERICAN  PHARMACEUTICAL  ASSOCIATION. 
First  Session,  Tuesday,  September  9th. — The  pharmacists  of  Indianapolis  had 
secured  the  use  of  the  Supreme  Court-room  for  holding  the  annual  meeting,  for 
which  purposes  it  proved  to  be  admirably  adapted.  Shortly  after  3  o'clock  the 
meeting  was  called  to  order  by  President  Luhn,  and  the  Hon.  John  Caven,  Mayor 
of  Indianapolis,  being  introduced,  addressed  the  Association  and  extended  to  the 
members  a  cordial  welcome,  to  which  the  President  briefly  responded.  The  various 
delegations  handed  in  their  credentials,  which  were  referred  to  a  committee  consist- 
ing of  Messrs.  A.  E.  Ebert,  of  Illinois;  T.  Roberts  Baker,  of  Virginia,  and  Jos.  L. 
Lemberger,  of  Pennsylvania.  While  the  committee  attended  to  the  duties  entrusted 
to  them,  the  President  delivered  his  annual  address,  in  which  he  dwelled  particularly 
upon  the  objects  of  the  Association,  the  work  it  has  accomplished  and  the  labor 
which  is  still  before  it.    The  address  was  referred  to  a  committee,  consisting  of 
