Every person should know the largest doses, which is safe to take, of active medicines. The following table shows the largest doses admissible, in grammes, and also the equivalent i a grains for solids, and in minims for liquids. The doses are expressed in fractions, thus: 1-13, 1-64, meaning one-thirteenth, one-sixty-fourth. In non-professional hands it is the safest plan to strictly observe the rule of never giving the maximum dose of any medicine:

Medicines.                               Grammes. Grains.

Arsenious Acid.........005               1-13

Acid, Carbolic..........05                   3/4

Acid, Hydrocyanic.......06                     1

Aconita.............0041             1-16

Aconite Root..........15                  2%

Arsenic, Iodide.........025                  3/8

Atropia.............001               1-64

Atropia Sulph.........001               1-64

Barium, Chlor..........12                 1-64

Belladonna, Herb........2                       3

Belladonna, Root........1                    1½

Codia..............05                   3/4

Conia..............001               1-64

Digitalis............3                   4½

Ext Aconite Leaves.......1                    1½

Ext Aconite Root........025                  3/8

Ext Belladonna.........1                    1½

Ext Cannabis Indica.......1                    1½

Ext Conium..........18                  2¾

Ext Digitalis..........2                        3

Ext Nux Vomica, Ale......05                    ¾

Ext, Opium..........1                    1½

Ext Stramon, Seed.......05                    ¾

Fowler's Solution........4              6 min,

Lead, Sugar of..........06                9-10

Mercury, Corrosive Chlor . . . .03                 9-20

Mercury, Red Iodide......03                 9-20

Morphia and its Salts......03                9-20

Nitrate Silver..........03                9-20

Oil, Croton...........06                9 10

Opium.............15                  2¼

Phosphorus...........015                 2-9

Potassa, Arsenite.........005               1-T3

Potassa Cyanide.........03                9-20

Santonine............1                    1½

Soda, Arsenite..........005              1-13

Strychnia and Salts........01                  1-6

Tartar Emetic..........2                      3

Veratria.............005              1.13

Veratrum Viride.........3                   4½

Zinc, Chloride..........015                2-9

Zinc, Valeriante ........ .06                9-10