592 
Metric  Medicine  Glass. 
f  Am.  Jour.  Pharm. 
\   December,  1901. 
lents,  we  find  that  they  do  not  fit  in  well  with  the  decimal  system  of 
notation.  In  round  numbers  these  equivalents  would  be  4  and  16  c.c. 
As  square  numbers  require  considerable  thought  when  used  as 
decimals,  the  sums  resulting  from  their  multiplication  are  usually 
inconvenient  and  awkward,  and  do  not  even-up  into  full  round  num- 
bers, it  will  readily  appeal  to  any  one,  that  to  use  a  decimal  system 
to  advantage  all  the  factors  must,  or  should,  fit  into  and  be  well 
adapted  to  use  in  decimal  notation.  To  overcome,  as  much  as  pos- 
sible, any  tangible  objection  or  obstacle  to  the  use  of,  or  the  ready 
acquisition  of  a  working  knowledge  of,  the  metric  system,  we  have 
devised  a  medicine  glass  that  would  conform  more  readily  with  a 
decimal  system  of  notation.  This  medicine  tumbler  is  graduated  so 
as  to  conform  with  the  approximate  equivalent  of  a  teaspoon  as  rec- 
ognized in  France  and  other  countries  that  have  adopted  the  metric 
A  Metric  Medicine  Glass. 
system.  In  these  countries  the  teaspoon  is  taken  to  be  the  equiva- 
lent of  5  c.c,  and  the  tablespoon  is  taken  as  the  equivalent  of  20  c.c, 
or  four  teaspoonsful.  In  this  latter  particular  our  tumbler  differs 
from  the  usually  accepted  ideas,  as  the  tablespoon  is  graduated  to 
the  equivalent  of  15  c.c,  or  three  teaspoons.  This  we  think  repre- 
sents more  nearly  the  approximate  relation  between  a  tea  and 
tablespoon  of  average  capacity,  and,  in  addition  to  this,  comes 
nearer  the  generally  accepted  value  of  capacity  for  the  tablespoon 
as  used  in  this  country  at  the  present  time. 
This  particular  medicine  tumbler  is  of  the  pressed-glass  variety, 
with  markings  on  the  inside.  The  graduations,  however,  are  now 
etched  in,  in  preference  to  the  moulded  graduations  that  were  used 
at  first.    These  moulded  graduations  were  found  to  be  far  from  sat- 
