376

MODERN PAPER-MAKING

SPECIFIC GRAVITY OF SOLUTIONS OF CAUSTIC SODA (60° F.= i5° C.).

Twaddell
Grammes per Litre NazO
Twaddell
Grammes per Litre Naf>
Twaddell
Grammes per Litre NaŁ>

I
3-7
26
100.5
5i
223.4

2
7-5
27
105.0
52
208.9

3
n-3
28
109.6
53
234-4

4
I5-I
29
114.1
54
240.0

5
18.8
30
118.6
55
245-5

6
22.6
3i
123.2
56
251.0

7
26.4
32
127.7
57
256.6

8
30.2
33
132.2
58
262.1

9
33-9
34
136.8
59
267.6

10
37-7
35
I4I.3
60
273.2

ii
41.6
36
145-8
61
279-3

12
45-5
37
150.4
62
285.4

13
49-4
38
154.9
63
291.5

14
53-2
39
159-4
64
297.7

15
57-1
,40
164.0
^5
303.8

16
61.0
41
169.4
66
309.9

17
64.9
42
174-7
<57
316.0

18
68.8
43
180.1
68
322.2

19
72.7
44
185.5
69
328.3

20
76.5
45
190.9
70
3344

21
80.4
46
196.3
71
340.8

22
84.3
47
201.7
72
347-2

23
88.2
48
207.0
73
353-6

24
92.1
49
212.4
74
360.1

25
96.0
50
217.8
75
366.5

NOTE.—To find Ib. soda (Na O) per cubic foot, divide grammes per litre by 16