972
WATER.— Analysis. Organic Carbon and Nitrogen.
after introducing oxygen to the laboratory vessel.As soon as the liquid in the laboratory vessel,when thrown up against the side, runs off withoutleaving a dark stain on the glass, all the oxygen isknown to be absorbed, and the gas is again measured.We have thus three measurements of the gas whichmaybe called A, B, and C. A — B —theC0 2 ; B — C=the nitric oxide; and C = the nitrogen. The mostrapid method of calculating the carbon and nitrogenfrom these volumes is to assume that all the gas isnitrogen; calculate the weight of each volume on
TABLE 1. — ELASTICITY OF AQUEOUS VAPOUR FOR EACHONE-TENTH DEGREE CENTIGRADE FROM 0° TO 30° C.(REGNAULT.)
ai .
I * r .
3 S jj
sflfs
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go
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si
HI
a = S
s S!&
111| = S
.2 8 g
a = 3
If -
! & |c = E
! a
sa
H
HJS ®
Eh
HSo
S 3
Hiss'S
0
4-6
6-0
7-0
12*0
10-5
18*0
15-4
24*0
22*2
•1
4'6
•1
7-0
•1
10-5
*1
15-5
*1
22-3
•2
4-7
*2
7*1
'2
10-6
•2
15 'G
*2
22-5
•3
4*7
•3
71
*3
10*7
*3
15*7
*3
22-6
•4
4-7
*4
7-2
*4
10*7
*4
15-7
*4
22-7
•5
4-8
■5
7-2
*5
10-8
•5
15-8
■5
22'9
•6
4-8
•6
7-3
•6
10-9
*6
15-9
*G
23-0
*7
4-8
•7
7*3
■7
10-9
•7
16-0
*7
231
•8
4 9
•8
7*4
*8
11-0
■8
16-1
*8
23-3
•9
4-9
*9
7-4
*9
111
*9
16*2
*9
23*4
l-o
4*9
7-0
7*5
13*0
11*2
19*0
1 G -3
25-0
23*5
•1
50
•1
7*5
*1
11-2
*1
16*4
*1
23*7
•‘2
5-0
•2
7*6
*2
11-3
*2
16*6
*2
23*8
•3
5-0
•3
7*6
*3
11*4
*3
16*7
*3
24-0
•4
5*1
*4
7-7
*4
iro
•4
16-8
•4
24-1
*5
5-1
•5
7-8
•5
11 ’5
■5
16-9
•5
24-3
*6
5-2
•6
7-8
*6
11-6
*G
17-0
*6
24-4
*7
5-2
•7
7-9
■7
11-7
•7
17-1
*7
24-6
•8
5-2
*8
7-9
•8
11-8
*8
17*2
•8
247
*9
5'3
•9
8-0
•9
11*8
*9
17-3
*9
24*8
2*0
5*3
8-0
8-0
u-o
11-9
20-0
17-4
26'0
25*0
T
5*3
•1
8'1
*1
12-0
*1
17-5
*1
25-1
•2
5-4
•2
8*1
*2
12'1
*2
17-6
*2
25*3
•3
5-4
•3
8‘2
•3
12*1
*3
17*7
•3
25*4
•4
5*5
•4
8*2
*4
12*2
*4
17*8
*4
25*6
•5
5-5
•5
8’3
*5
12*3
*5
17-9
■5
25*7
•6
5-5
■6
8-3
•6
12*4
*G
18-0
*6
25*9
•7
5-6
■7
8-4
*7
12-5
*7
18-2
*7
26*0
■8
5-6
■8
8*5
•8
12*5
■8
18-3
•8
26*2
■9
5*6
•9
8-5
•9
12-6
*9
18-4
*9
26-4
3-0
5-7
9-0
8'6
15*0
12-7
21-0
18-5
27'0
26'5
'I
5'7
•1
8'6
*1
12-8
*1
18-6
*1
26-7
•9
5*8
•2
8'7
•2
12*9
*2
18-7
*2
26*8
•3
5*8
•3
8-7
*3
12-9
*3
18-8
*3
27-0
•4
5-8
•4
8-8
*4
13*0
*4
19*0
■4
27-1
•5
5-9
•5
8-9
■5
13-1
•5
19*1
*5
27*3
•6
5-9
•6
8*9
*6
13*2
*6
19-2
*6
27-5
*7
6-0
•7
9-0
*7
13*3
*7
19*3
*7
27-6
•8
6*0
■8
9-0
•8
13*4
*8
19*4
•8
27*8
•9
6-1
•9
9-1
*9
13-5
•9
19-5
*9
27*9
40
6'1
10-0
9-2
16-0
13-5
22'0
19-7
28-0
28-1
T
o-i
•1
9-2
'1
13*6
1
19-8
*1
28-3
■2
6-2
•2
9-3
*2
13*7
*2
19-9
*2
28-4
*3
6-2
*3
9*3
*3
13-8
*3
20’0
*3
28'6
•4
6'3
•4
9*4
*4
13*9
*4
20-1
•4
28-8
•5
6'3
•5
9-5
■5
14-0
*5
20-3
■5
28-9
'6
6-4
•6
9*5
*6
14*1
*6
20-4
•6
29*1
■7
6-4
■7
9’6
*7
14-2
*7
20-5
*7
29-3
•8
6'4
•8
9-7
•8
14-2
*8
20-6
■8
29-4
•9
6'5
•9
9'7
*9
14*3
*9
20-8
*9
29-6
'VO
6'5
11-0
9-8
17-0
14-4
23'0
20*9
29-0
29-8
•1
6’6
'I
9-9
*1
I 4'5
*1
21-0
•1
30*0
•2
6'6
•2
9-9
*2
14*6
*2
21-1
•2
30-1
•3
6-7
•3
lO'O
*3
14-7
*3
21*3
*3
30-3
•4
6-7
•4
10-1
•4
14-8
*4
21*4
•4
30*5
•5
6*8
•5
101
•5
14-9
•5
21*5
*5
30'7
•6
6-8
•6
10*2
■6
15-0
*6
21*7
*6
30'8
•7
6-9
•7
10*3
*7
15'1
*7
21-8
*7
31*0
•8
6'9
•8
10*3
*8
15-2
•8
21*9
*8
31*2
■9
7-0
•9
10-4
*9
I 5'3
•9
22-1
*9
31-4
that supposition, and then calculate the quantity ofcarbon corresponding to the nitrogen, whose volumeis A — B. The weight of the carbon is (A — B) 3,
One cubic
and of the nitrogen. ——- + 0 =
2 2
! centimetre of nitrogen at 0° C. and 760 m.m. pres-[ sure, weighs 0-0012562 gram., so that the weight ofv c.c. of nitrogen at p m.m. pressure, and t ° C. is
1 0-0012562 XvXp . ,, . , _
- !- ■ As the inner surface of the
(1+0-00367 0760
measuring tube is always kept moist with water, thegas when measured is always saturated with aqueousvapour, and the pressure observed must be correctedfor this. Table I. gives the elasticity of aqueousvapour in millimetres of mercury for each 0-1° C.from 0° to 30°; and in Table IT. is given the logarithm. 0-0012562
oi the value ol the expression-
(1 + 0*00367 t) 760for a similar range of temperature.
TABLE II.—DEDUCTION OF CUBIC CENTIMETRES OF NITROGENTO GRAMS.
o 0012562 f or eflc h tenth of a degree from 0° to 30° C.
Log.
(1 +0 •003670760
t° c.
00
01
02
0 3
04
0-5
0-6
07
0-8
0-9
0°
6-21824
808
793
777
761
745
729
713
697
681
1
665
649
633
617
601
586
570
554
538
522
2
507
491
475
459
443
427
412
396
380
364
3
349
333
318
302
286
270
255
239
223
208
4
192
177
161
145
130
114
098
083
067
051
5
035
020
004
*989
*973
*957
*942
*926
*911
*895
6
6-20879
864
848
833
817
801
786
770
755
739
7
723
708
692
676
GG1
645
629
614
598
583
8
567
552
536
521
505
490
474
459
443
428
9
413
397
382
366
351
335
320
304
289
274
10
259
244
228
213
198
182
167
151
136
121
11
106
090
075
060
045
029
014
*999
*984
*969
12
6-19953
938
923
907
892
877
862
846
831
816
13
800
785
770
755
740
724
709
694
679
664
14
648
633
618
603
588
573
558
543
528
513
15
497
482
467
452
437
422
407
392
377
362
16
346
331
316
301
286
271
256
241
226
211
17
196
181
166
151
136
121
106
091
076
061
18
046
031
016
001
*986
*971
*956
*941
*926
*911
19
6-18897
882
867
852
837
822
807
792
777
762
20
748
733
718
703
688
673
659
644
629
614
21
600
585
570
555
540
526
511
496
481
466
22
452
437
422
408
393
378
363
349
334
319
23
305
290
275
261
246
231
216
202
187
172
24
158
143
128
114
099
084
070
055
041
026
25
012
*997
*982
*968
*953
*938
*924
*909
*895
*880
26
6-17866
851
837
822
808
793
779
764
750
735
27
721
706
692
677
663
648
634
619
605
590
28
576
561
547
532
518
503
489
475
460
446
29
432
417
403
388
374
360
345
331
316
302
An example will best show the exact method:—
Volume of gas,.
Temperature..
Height of mercury inmeasuring tube, ....Height of mercury inpressure tube,.
Difference,.