198 
BOTANICAL GAZETTE 
TABLE III 
hie 
CULTURES OF SPIROGYRA LONGATA IN COLLOIDAL PLATINUM SOLUTION, WITH AND 
THOUT ADDITIONS 
Platin medium, Other substances in Durie 
Culture no. approximately, got gn ag Condition of plants cupeenenaa poe 
1s Bag ae ie Re.” Oe ee eats Oe Eg, E 22,3 
TAG on ees 86.4 ECL 6:2 ig 12 
PAD ace i fe tir oe ep do., control to Pd 6 
I 
Pebs est et 86.4 MgS04, 0.02 Gp 19 
ECR SARC tenes ee re oe ener eer do., control to Pd, D 6, 2 
100 48.0 Tap — 50.0 G 20 
TOR Cees Se Pe eee do. trol to Pd 12 
Pe 
TOG ee 48.0 Ord. dist. H.O, Gp 26 
ROG G8 ee ale ee see do., control to DoD. Pp 2,1,1 
I 
ay eek et ea rc, ©; cok. Pd 12 
MgSO, o 
po ee 
TABLE IV 
CULTURES OF SPIROGYRA DECIMINA (NOS. 18-23b) AND OF OSCILLATORIA (NO. 24) IN 
Co) 
UM HYDRATE SOLUTION, 
WITH AND WITHOUT ADDITIONS 
Sone aa _— substances in Duration of 
Culture no. NaOH, per pect’ sacs ee ae mabe Condit f plants) experiment, days 
m. 
se ait 
1S Ase 0.02 Colloid. Au, Pd 4 
90.0 
10... CrOne oer ee Pd = 
20.20 ee 0.01 Colloid. Pt E 2 
8.0 
$108 ots vee i OR OR i Aaa essa t Eg t 
eb oe ee O60 6 oe. E, Eg 1,1 
Pe Pelee cera e aa 0.02 AuCl,, 100.0 Eg I 
20h. eee 0.01 0. Eg, Gp yf 
PA eel ces 0.02 Colloid. Pt, E : 
86.4 
2b es 0.01 Colloid. Pt, E, E :* 
4 
OY Re geeeee oe, a 0.02 Colloid. Au, E, E 4,3 
go.0 
Ls 
lati a: le 4 was a portion ofthat employed it 
gage el - the colloidal gold solution; that used in siteaoes shes was prepared at another time- 
ga used in no. 24 was Oscillatoria from a 0.1 per cent Sachs’s solution, thickened with 1 Per 
cent agar. 
