300 
Alexandria  and  India  Senna. 
Am.  Jour.  Pharm . 
June,  1897. 
Commencing  in  this  manner  with  the  ordinary  epidermal  cells,  the 
following  results  were  obtained :  The  size  and  shape  of  the  epider- 
mal cells  are  extremely  variable  (see  Figs.  6  and  y),  and  are,  as  was 
stated  in  the  former  paper,  little  to  be  depended  upon  as  a  means  of 
identification.  However,  no  mistake  was  made  in  ascribing  some- 
what larger  cells  to  the  Alexandria  variety,  as  the  following  table 
of  careful  measurements  will  show: 
Tabi,e 
India  Senna. 
Lower  side  of  leaf. 
Long  diameter.    Short  diameter. 
13  x  10 
13  x  8-5 
13  x  7 
15  x  12 
Av.,  13-5 
9-38 
Alexandria  Senna. 
Lower  side  of  leaf. 
Loug  diameter.    Short  diameter. 
H'5  x  11 
17  x  10 
10*5  x  9 
Av.,  14 
Tabi^e  2. 
India  Senna. 
Taken  at  random  with  two-thirds 
objective.    Some  long  and 
some  short  diameters. 
J '4 
i-6 
1*5 
I'2 
12 
Alexandria  Senna. 
Two-thirds  objective 
diameter,  taken  at  random. 
2*2 
17 
1 '4 
i'5 
i-8 
r6 
Av.,  1 -38 
Av.,  17 
Tabi^e  3. 
India  Senna. 
Adjacent  cells  of  upper  side 
of  leaf,  two-thirds  objective. 
17 
i-8 
.  o-6 
i*5 
Av.,  1  "4 
Alexandria  Senna. 
Adjacent  cells  of  upper  side 
of  leaf,  two-thirds  objective. 
1-9 
i-8 
i*5 
2'3 
1*6 
o-6 
07 
Av.,  1 '48 
