454  Mydriatic  Alkaloids.  {*%S3S£^ 
Dalmatian.  French. 
Specific  gravity  at  150  C.  ......  .  0-900  to  0*915       0*900  to  0*915 
Optical  rotation  +  i°  to  +  40       +  i°  to  +n° 
Both  the  Dalmatian  and  the  French  oil  should  give  a  clear  solution 
with  1  part  of  90  per  cent,  alcohol  and  10  parts  of  80  per  cent,  alco- 
hol. The  authors  have  examined  in  the  past  two  years  about  fif- 
teen samples  of  oil  submitted  to  them  for  examination,  of  which  they 
give  the  following  data  : 
Specific  gravity      Bornyl  Optical 
Marked.  150  C.  Acetate.  Rotation. 
Dalmatian   0*895 
  0*897  +3°°59/ 
  0*903  +  i°36' 
French   0*903  -)-  n°  37' 
"      extra   0*907  3*0  -f-  90  i2/ 
"   0*903  3-8  +  6°  43' 
flowers   o*888  8*3  +  50  45/ 
Eperle   0*887  7 '4  4-  o°  50' 
  0*903  4-0  +  5°45/ 
"      Eperle   0*910  +  4°  36' 
  0*884  3*4  +i8°3o' 
Eperle   o'888  4*9  +  180  3o/ 
  0*899  37  +  o°3o/ 
11      Eperle   0*890  3*1  —  20  53/ 
Dalmatian  .  .  .  0*904  -f   20  36/ 
Solubility  in  95  per  cent,  alcohol :  Nos.  I  to  10,  in  all  parts;  No. 
II,  in  5  parts,  no  more;  No.  12,  in  3  parts,  no  more  ;  Nos.  13,  14 
and  1 5,  in  all  parts. 
Solubility  in  80  per  cent,  alcohol :  Nos.  5  and  9,  y2  part ;  Nos. 
6,  10  and  13,  1  part ;  Nos.  7,  8,  1 1,  12  and  14,  not  in  10  parts  ;  No. 
15,  in  5  parts. 
Analytical  Department, 
Smith,  Kline  &  French  Company. 
THE  MYDRIATIC  ALKALOIDS.1 
BY  J.  O.  SCHI.OTTKRBECK. 
A  little  over  fifty  years  ago  Pasteur,  while  working  upon  racemic 
acid,  published  his  classic  researches  upon  the  relations  that  may 
exist  between  crystalline  form,  chemical  composition  and  optical 
activity.    Briefly  stated,  by  making  a  double  sodium  ammonium 
Address  of  the  Chairman  of  the  Scientific  Section  of  the  American  Pharma- 
ceutical Association,  August,  1903. 
