192 
Analyses of the air near the tip of the 
root (Nuphar). 4,6 °/o 0 2 . 
Analyses of the air 30 cm higher up 
the root. 8,6 °/o 0 2 , 
In order to get analyses which give true figures of the real 
circumstances I have made the analyses in the follovving way; 
the plant was pulled up and the roots and rhizoma examined — 
submerged in water — for cocoons. 
When a cocoon was found the analysis apparatus was held 
in the water and the air from the cocoon squeezed up in the 
funnel and analysed. 
Thereupon an analysis of the air in the intercellular spaces 
was made, the air being procured either by cutting the root 
through, where the cocoon had been attached, or by squeezing it 
out trough the hole made by the larva in order to bring about 
communication between the cocoon and the intercellular spaces. 
As the root during these two analyses was lying in the water 
in intact state the analyses are, according to the analyses on p. 6—7, 
in agreement with the real circumstances. 
Of my analyses I shall mention the following: 
7 /7 1914. Nuphar root. Composition of the air in 
the intercellular spaces. 10,8 °/o 0 9 . 
— Composition of the air in the cocoon 
attached to the above mentioned root. ... 3,6 °/o 0 2 . 
Diff. + 7,2 o/o 0 2 . 
rd h — Nuphar root. Intercellular air. 8,9 °/o O.,. 
— Cocoon air. 2,9 °/o 0 2 . 
Diff. + 6,0 °/o 0 2 . 
3 h — Intercellular air. 9,6 °/o 0 9 . 
— Cocoon air. 4,9 °/o 0 2 . 
Diff. -f- 4,6 °/o 0 9 . 
