FOLIAGE-LEAVFS AND THE CHLOROPHYLL FUNCTION. 545 
N N 
3 N 
2.. 
== 
Be, — =š 
=) —Ya 
Pd — == 
SS 
== 
== E. 
—=zzzzzzzzxzz ; 
EL Z Fossss. a Lid hbhdhd Z—— ¿Z 2 ¿2 
—— 
L 
Apparatus for growing plants in an atmosphere free from CO,. 
1. Dish containing solution of potassium hydrate. 
2. Specimen of Arisema triphyllum 10 days after opening of bud. 
3. Receiver of 10 litres capacity. 
4, Outlet-tube connected with aspirator. 
5. Sticks of potassium hydrate and moist asbestos fibre. 
6-9. Detail of method for sealing plant in receiver.—6. Cork. 
7. Asbestos fibre. 8. Mercury. 9. Stem of plant. 
10. Sponge saturated with water. 
LINN, JOURN.—BOTANY, VOL. XXXI. 2k 
