192 
/ngvar Jorgensen and Walter Stiles. 
Table XXVII — continued. 
Species. 
Respiratory 
Coefficient. 
Apparent 
Assimilatory 
Coefficient. 
Maize ... 
1-07 
105 
Oleander 
1.05 
P 01 
Pea 
107 
1-04 
Pear ... ... . . 
MO 
1-08 
Poppy 
1-09 
1-09 
Privet ... 
103 
1-02 
Rhubarb 
1-02 
1.00 
Ricinus ... ... . 
103 
1-03 
Rose ... . 
1-02 
1-00 
Spindle-tree ... 
108 
P 02 
Sorrel ... 
1-04 
1-04 
Tobacco ... ... . 
103 
1-04 
Turnip... 
111 
1-06 
Vine ... 
1-01 
0-99 
Wheat. . 
103 
1-02 
Wild Grape ... 
1-00 
1-01 
From their results Maquenne and Demoussy conclude that the 
value of the apparent assimilatory coefficient lies between that of 
the respiratory coefficient and unity, especially as the leaves were 
probably at a higher temperature during the assimilatory period 
than in the dark, and as the respiratory coefficient rises with 
temperature, higher respiratory coefficients probably correspond 
with the assimilatory coefficients given. 
They therefore conclude that the real assimilatory coefficient 
approximates to unity. 
For if c is the volume of oxygen evolved in assimilation alone, 
and if d is the volume of carbon dioxide absorbed in assimilation 
alone, 
And if a is the volume of carbon dioxide evolved in respiration, 
and if b is the volume of oxygen absorbed in respiration, 
a 
b 
= m, the respiratory coefficient, 
A 
and 
c—b 
d—a 
— the apparent assimilatory coefficient. 
We see that 
c—b 
d—a 
is between 1 and m. 
When, as in the general case m > 1 
