158 STORRS AGRICULTURAL EXPERIMENT STATION - 
DARL E ON OSaie 
Farts by weight of carbon dioxide in 10,000 parts of air 
| found under sitting hens. 






Hens A B GC Barn 
March 11 noe rN 5: aes bee 
March 12 4.9 4.9 6.9 4.4% 
March 13 4.8 3.8 3.8 SaT 
March 14 0.9 re 6.3 5.9 
March 15 Saath 6.6 db: U0 BS 
March 16 —— as —-— —— 
March 17 oe pe Se4 —- 
March 18 Sa yee, a ear 3.9 
March 19 soa | 6.9 6.9 4.8 
March 20 4.4 4.4 A. 4 Eh ae 
March 21 ‘Spas DOLD ao 4.3 
March 22 oe ee — —- 
March 23 4.5 eee" 6.8 oe 
March 24 ss —— ~-— as 
- March 25 6.8 Tie G52 3.9 
March 26 6.6 12.0 Tu2 3.9 
March 27 4.6 1925 Taye 3.8 
March 28 Oe DAMS 15.7 3.9 
March 29 4.5 Zit ZO 3.9 
March 30 po a —- 
March 31 3. 4 Died 16.4 Ae 
Aprils <1 3.4 22.0 Lie 3.8 





*China Eggs. tGood Eggs under A and B., 
In this paper are given tables showing the results of our 
work up to the present time. They are typical of the results 
found in all the work along this line at this station. 
Pettenkofer’s titration method, modified in some respects, 
was used to determine the amount of carbon dioxide. In 
Table I a flask of 500 c.c. capacity was used and air was as- 
pirated through this flask. The air in the flask was displaced 
by that from under the hen. The aspiration method was used 
for simplicity after a test had been made to test the difference 
between this method and the one where the flask is filled with 
water and drawn off, the air from under the hen taking its 
place. No perceptible difference in results was found by the 
two methods. The flasks were filled by drawing 1000 c.c. of 
air through them in 114 minutes. Duplicate samples dtawn 
