562 
Richards . — The Respiration of 
Experiment 12 . 
5 potatoes, 180 grams. Quartered and washed. Exhausted 
under air-pump for half an hour ; from thence attached 
receiver at once to Pettenkofer apparatus. 
Date. 
Time. 
Tempera- 
ture. 
mg. C0 2 
produced 
per hour. 
ii. 13. ’96 
4.OO - 5.OO p.m. 
20° 
8.40 
55 
5.00 - 6.00 „ 
20° 
9*00 
55 
6.00 - 7.00 „ 
20°*4 
9*25 
55 
7.00 - 9.CO „ 
20°-3 
9.40 
ii. 14. ’96 
8.20 - 9.20 a.m. 
20°*3 
9-60 
55 
6.00 - 7.00 p m. 
20°.6 
14.20 
Experiment 13 . 
7 potatoes, 200 grams. Cut into quarters Feb. 11, 10 a.m. ; 
allowed to stand over a day until the respiration had about 
reached its maximum. Air-current, 3*5 litres per hour. 
Date. 
Time. 
Tempera- 
ture. 
mg. C0 2 
produced 
per hour. 
ii. 12. ’96 
8.00 - 9.00 a.m. 
20°. 8 
I 7-60 
55 
9.00 - 10.00 ,, 
20°. 7 
18.00 
Cut quarters covered with clay and stuck together. 
ii. 12. ’96 
12.30 - 1. 00 p.m. 
20°-4 
10-40* 
55 
1 .00 - 3.00 „ 
20°-4 
10-50* 
55 
3.00 - 4.00 „ 
20°-9 
12-00 
55 
4.00 - 5.00 „ 
20°-7 
13 * 4 ° 
ii. 13. ’96 
9.20 - 10.20 a.m. 
21° 
9.20 
55 
10.20 - 11.20 ,, 
Clay removed. 
21° 
8.80 
ii. 13. ’96 
11.45 - 12.45 P- m - 
20°-8 
23-20 
» 
12.45- M5 » 
20 0 .6 
19.84 
55 
1.45 - 2.45 „ 
20°*5 
I 5 ° 9 ° 
55 
2.45 - 5.00 „ 
20°-5 
16-20* 
1 
* Reduced to value of i hour. 
