112 
Journal of Agricultural Research 
Vol. XXin, No. a 
Tabi,i$ i. —Calculation of gas volumes and units (•milligrams per gram dry weight in 24 
hours) of respiratory exchange 
Symbol. 
K- 
h<y. 
Pi- 
h^, P 2* 
V 2 . 
h 4 , P 3 . 
Formula (2). 
Vol. 1. 
Vol.2. 
Vol.3. 
Vol.4. 
Vol.5. 
h . 
Vol.6. 
Vol.7. 
Formula (4a). 
Formula (4b). 
Data. 
Volume of empty apparatus. 
Volume of imbibed seeds.... 
Volume of air in the apparatus. 
Weight of the imbibed seeds— .... - 
Percentage of dry weight of the imbibed 
seeds. 
Dry weight of the seeds (calculated). 
Stoppers inserted 12.30 p. m., May 27. 
Stopcocks closed 12.45 p. m. } May 27. 
Temperature 19.o° C. 
Atmospheric pressure 762.2 mm. at 22.5°C 
—759.3 mm. at o° C. 
Manometer readings 10.00 a. m. May 29. . 
Caustic solution added. 
Manometer readings 10.15 a. m. May 29. . 
Temperature i9.o°C. 
Atmospheric pressure 768.2 mm.at 24 0 C 
=765.0 mm. at o° C. 
Vol. ° 7 6o= Vol. — F. P. 
P 
F =0.001247—4/5 (0.001247 — 0.001226) = 
0.001230. 
0.001230 ViP 1. 
.001230 Vi+ 9 -Pl? . ? . (P 4 +P 2 ). 
6-37 
-v 2 +ey??(p 4 +p 3 ) 
6-37 
.001230 I'V 
Approximate volume oxygen=Vol. 1 
Vol.3. 
Approximate volume C 0 2 =Vol. 2 — Vol. 3 . 
Length of period=/z 4 —A x =45.75 hours. 
Period for oxygen=/* 4 -/* 2 =45-$o hours. 
Period for oxygen included with C 0 2 . 
=^4-/23=0.25 hours. 
True volume oxygen=Vol.4-f- 1 aX 5 i~ 4 5 - 5 ° 
45 * 5 ° 
Vol. 4. 
True volumeC02=Vol.5——i-A Vol. 4 .. 
3 45 - 5 ° 
„ . ■ Vol.7 
Respiratory quotient —y 0 ]~6. 
■y__ 34293.6a; a=Vol.6. 
^ of seeds. 
h— 45‘75 
X=mgm. oxygen consumed per gm. dry 
weight in 24 hours. 
y_ 47443 * 2a > a=Vol.7. 
ch c=Dry weight seeds. 
^= 45-75 
Y=mgm. C 0 2 produced per gm. dry 
weight in 24 hours. 
No. 1. 
No. 
42.1 cc. 
3-4 
38.7 cc. 
3,052 mgm. 
53 
44.0 cc. 
3-4 
40.6 cc. 
3,112 mgm. 
S 3 
1,618 mgm. 1,649 m 8 m ' 
+ 1.8 
1.0 cc. 
-23.5 
36.14 cc. 
36.50 cc. 
34.35CC. 
1.79 cc. 
2 .15 CC. 
1.80 CC. 
2 .14 CC. 
I.I9 
1.80 
1,618 
.33 
2.14 
1,618 
1 -37 
+ i -3 
1.0 cc. 
“ 23-5 
37.92 cc. 
38.27 cc. 
36.08 cc. 
1.84 cc. 
2.19 CC. 
1.85 cc. 
2.18 cc. 
1.18 
1.85 
1,649 
.84 
2.18 
1,649 
1.36 
