apothecaries'

Weights

(and measures). Troy grains {or minims).

Metric Weights

(And measures).

Grams (or cubic centimeters).

1/64

0.001

(1/1000)

1/32

0.002

(2/1000)

1/16

O.Oo4

(4/1000)

1/8

0.008

(3/1000)

1/4

0.016

(1/60)

1/2

0.033

(1/30)

1

O.066

(1/15)

2

0.I33

(2/15)

5

0.333

(1/3)

10

O.666

(2/3)

15

1.000

(1)

20

1.333

(1 1/3)

30

2.000

(2)

apothecaries'

Weights

(and measures).

Drachms (or flitidrachms).

Metric weights

(and measures).

Grams

{or cubic centimeters).

I

4

2

8

4

16

6

24

Troy ounces (or fluidounces).

I

32

2

64

4

128

6

192

8

256

12

384

16

512

The adoption of the metric system of weights and measures is physician to continue to make use of fluid measures in writing prescriptions, especially as he is already accustomed to this, and would not then have to bear in mind the specific gravity of any liquid ingredient in the prescription. To the pharmacist it makes hut little difference, as he will have both weights and measures, and can use one or the other, as may be directed. If the physician discards measures, he must, of necessity, so adjust the proportion in his formula as to produce a mixture of which, after all, the dose must be a "teaspoonful," or some other convenient measure, and this is as unnecessary as it is difficult. - Oscar Oldberg, Phar. D., in Blackiston's Phys. Visiting List.

a matter of time only. Its advantages over other systems are well recognized.