Am.  Jour.  Pharu.. 
Dec,  189o. 
Weights  and  Measures. 
595 
Times. 
4  gramme  weight,   24 
500       "          "    19 
6       "          "   18 
40  and  150  gramme  weights,  each,   17 
.1    «'    30       "          "          "    16 
5,  15  and  80  gramme  weights,  each,   15 
60  gramme  weight,   14 
2       "          "    13 
90       "          "    12 
12  and  800  gramme  weights,  each,   10 
65    "   700       "          "          "    9 
25,  120,  300  and  400  gramme  weights,  each,   8 
3,     8,    70  "     85       "          «          "    7 
13  and  180  gramme  weights,  each,                                           .  6 
35,  140,  350  and  850  gramme  weights,  each,   5 
7,  45  and  750  gramme  weights  each,    4 
9,  18,  34,  38,  55  and  650  gramme  weights,  each,   3 
33        56        75        93        95  98 
125       160       170       250  330 
600       720       760       944  gramme  weights,  each  twice. 
The  following  weights  are  directed  but  once : 
16 
17 
19 
27 
29 
3i 
46 
47 
57 
63 
67 
7i 
77 
78 
83 
94 
no 
130 
175 
219 
220 
230 
236 
240 
260 
280 
310 
319 
320 
34o 
37o 
375 
410 
490 
520 
55o 
555 
580 
640 
670 
675 
680 
770 
825 
840 
870 
900 
920 
925 
95o 
1050 
3200 
6coo 
Decimal  quantities,  each  once,  as  follows : 
•06  —  'i6  —  -2  —  '50  —  "5  —  1  '2  —  2-5  —  6'5  grammes. 
We  find  that  in  making  up  all  the  preparations  given  in  the  U.  S. 
P.,  of  1890  (where  weight  is  indicated),  that  about  122  different 
quantities  are  directed,  while  the  number  of  times  that  these 
quantities  are  expressed  in  Gramme  Weights,  including  duplicates, 
are  about  906. 
In  view  of  the  fact  that  the  correct  working  of  the  formulae  of  the 
U.  S.  P.  involves  122  different  weights,  906  times  in  all,  it  is  of  the 
greatest  importance  to  the  pharmacist  to  be  able  to  weigh  these 
quantities  with  accuracy  and  despatch. 
In  no  other  way  can  this  be  done,  but  by  the  direct  use  of  the 
metric  weights. 
