Table For Preparing Percentage Solutions

Public Charities and the Department of Bellevue and Allied Hospitals 1

One fluid ounce of water, or 480 minims, weighs 456.4 grains. One pint of water, or 7680 minims, weighs 7300, or practically 7300 grains. Hence, a 10 per cent. solution, for instance, is one which contains 730 grains of some substance in 1 pint.

The following table will show at a glance the quantity of any substance, by weight, required to prepare one pint of a solution:

1. To Prepare One Pint Of A Solution

REQUIRED TO CONTAIN OF A CERTAIN SUBSTANCE

TAKE OF THE SUBSTANCE BELOW STATED AMOUNT IN GRAINS WITH ENOUGH WATER TO MAKE 1 PINT.

PER CENT.

OR

1 /100 Per cent...

1 in 10,000

Grains

0.73

¾

1/50 " ..........

1 in 5,000

"

1.46

(1½)

1/40 " ..............

1 in 4,000

"

1.83

(13)

1/30 " ..........

1 in 3,000

"

2.44

(21)

1/25 " ..........

1 in 2,500

"

2.92

(3)

1/20 " ..........

1 in 2,000

"

3.65

(31)

1/15 " ..........

1 in 1,500

"

4.87

(43)

1/10 " ..........

1 in 1,000

"

7.30

(71)

1 Arranged by the Public Charities and the Department of Bellevue and Allied Hospitals.

REQUIRED TO CONTAIN OF A CERTAIN SUBSTANCE

TAKE OF THE SUBSTANCE BELOW STATED AMOUNT IN GRAINS WITH ENOUGH WATER TO MAKE 1 PINT.

PER CENT.

OR

1/8 Percent.................

1 in 500

Grains

14.60

(141)

¼ " ..........

1 in 400

"

18.25

(181)

1/3 " ..........

1 in 300

"

24.33

(241)

½ " ..........

1 in 200

"

36.50

(361)

1 " ..........

1 in 100

"

73.00

(73)

1½ " ..........

1 in 75

"

97.33

(97)

2 " ..........

1 in 50

"

146.00

(146)

2½ " ..........

1 in 40

"

182.50

(180)

3 " ..........

1 in 33 1/3

"

219.22

(220)

4 " ..........

1 in 25

"

292.00

(290)

5 " ..........

1 in 20

"

365.00

(365)

10 " ..........

1 in 10

"

730.00

(730)

20 " ..........

1 in 5

"

1460.00

(1460)

25 " ..........

1 in 4

"

1825.00

(1825)

50 " ..........

1 in 2

"

3650.00

(3650)