61. Baum'es Hydrometer for Liquids Lighter than Water

61.    Baum'es Hydrometer for Liquids Lighter than Water. In Baum'e's hydrometer for liquids lighter than water, the instrument is poised, so that the 0 of the scale is at the bottom of the stem, when it is floating in a solution of 1 ounce common salt in 9 ounces water, and the depth to which it sinks in distilled water shows the 10th degree; the space between these fixed points being equally divided.

62. Table showing the Specific Gravity

62.    Table showing the Specific Gravity corresponding with the several degrees of Baum'e's Hydrometer for liquids lighter than water.

Degrees

Specific

Degrees

Specific

Baum'e

Gravity.

Baum'e

Gravity.

60°

.745

34°

.859

59

.749

33

.864

58

.753

32

.869

57

.757

31

.874

56

.760

30

.880

55

.764

29

.885

54

.768

28

.890

53

.773

27

.896

52

.777

26

.901

51

.781

25

.907

50

.785

24

.913

49

.789

23

-918

48

.794

22

.924

47

.798

21

.930

46

.802

20

.936

45

.807

19

.942

44

.811

18

.948

43

.816

17

.954

42

.820

16

.960

41

.825

15

.967

40

.830

14

.973

39

.834

13

.980

38

.839

12

.986

37

.844

11

.993

36

.849

10

1.000

35

.854

    

materials. This variety of Baum'e's hydrometer is usually called a saccharomater, and whenplungedin pure water at58° Fahr.,marks 0 upon its scale; in a solution containing 15 per cent, of common salt and 85 of water by weight, it marks 15°; so that each degree on the scale is meant to indicate a density corresponding to the percentage of the salt.

The temperature at which Baum'e's hydrometer was originally adjusted was 541/2° Fahr.; it is now commonly adjusted to 58° or 60° Fahr.; hence arise the discrepancies observable in the published tables of the "correspondence between degrees of Baum'e's and real specific gravities."