97 
On the Retention of Vitality by Alga. 
probable that the chief factor causing its elimination from the 1846 
sample is the great length of the period of desiccation, and that 
between sixty and seventy years is about the limit of its endurance. 
- Oi W-* 
No. of Culture. 
Broadbalk 
Broadbalk 
Broadbalk 
Broadbalk 
Broadbalk 
Broadbalk 
Broadbalk 
Agdell , 
Barnfield 
Barnfield 
Barnfield, plot la 
Hoosfield 
Geescroft 
Name of Field. 
12% (?) 
3% 
10 pc. in 1912 
3 - 3 p.c. ,, 1915 
10% 
10% 
Water-Content. 
MM M t— * >—, t—‘ i M M M M M> 
oooeacooooosoooooooooooooo 
o»ooooo^aoiuiODtCM« 
Date of Collection. 
> i—* t—‘ *— >—» *—* •—* >—* — —* >—* 
1-^1—» 
i tO tO Cl Cl tO tO tO tO K5 tO tO tO tO 
Date of Removal from Original Bottle. 
ci 
- X 
►—* 
; CO 
Date of Moistening of Soil. 
>—• •—• <—• ■ i-* 
co cn os ■ w co 
- x - - x - x x - - X 
1—» • »—• * t—t 
j w 5J oi Cflyi ci 
Date of Inoculation of Culture. 
Nostoc muscoyum Kiitz. 
t—* >—* V-* »—* 
Nostoc Passerinianum Bornet et Thuret. 
M H H H H « t—t—‘ H-» *—‘ 
Nostoc sp ? Juvenile form. 
— 
Anabcsna laxa (Rabh.) A Br. ? 
- 
Anabana oscillarioides Bory forma. 
- 
A. oscillarioides Bory var. terrcstris forma minor. 
h—* — — H-* 
A. oscillarioides Bory var. terrestris forma major. 
*—» t—-* ►—* •—* 
Nodularia Harvey ana (Thwaites) Thuret. 
M M 
Cylindrospermum licheniforme (Bory) Kiitz. 
1 •—* 
Plectonema Battersii Gomont. 
Hapalosiphon flexuosus Borzi forma (?) 
- 
Phormidium tenue (Menegh.) Gomont. 
- ' 
Nitzschia Palce (Kiitz.) W. Sm. 
‘ i—* 
Trochiscia aspera (Reinsch) Hansg. 
t 
Chlorococcum humicola (Naeg) Rabenh. 
Stichococcus bacillaris Naeg. 
