32 
Messrs Purvis and Warwick, The Influence of 
8.30p.m. Red light. In Cerevisiae the spores were almost complete; 
in Ellipsoideus the granulations were forming rings. 
Green light. Showed faint indications of sporulation in 
Ellipsoideus ; and they appeared to be stronger in the 
Cerevisiae. 
Blue light. Faint indications of spores in Ellipsoideus 
and in Cerevisiae. 
White light. Same appearance as in the red light ; except 
that the spores of Cerevisiae were slightly less developed. 
16 February. 
9.45 a.m. Red light. In Cerevisiae there was nearly complete sporu- 
lation in most of the cells ; and in Ellipsoideus there 
were occasional cells with spores. 
Green light. In Cerevisiae a certain amount of sporulation, 
but not very strongly. In Ellipsoideus there were slight 
indications of spore formation. 
Blue light. In Cerevisiae there were very faint indications 
of sporulation ; and in Ellipsoideus they were very like 
the appearance in the green light. 
White light. In Ellipsoideus, they were the same as in the 
red light ; and in the Cerevisiae there were some perfect 
spores, though not so many as in the red. 
5.30p.m. Red light. In Cerevisiae there was perfect sporulation; 
and in Ellipsoideus there were a few more spores than 
when examined at 9.45 a.m. 
Green light. In Ellipsoideus there were better indications 
of spores than at 9.45 a.m. ; the spores were more 
marked. In Cerevisiae the rings were more marked than 
a,t 9.45 a.m. 
Blue light. Ellipsoideus had hardly changed since morning ; 
and Cerevisiae shewed faint indications of spores but 
changed very little since morning. 
White light. Ellipsoideus had hardly changed since 9.45 a.m.; 
the spore rings appeared to be better marked ; and 
Cerevisiae shewed more perfect spores. 
10.45 pan. Red light. Ellipsoideus had made some advance and more 
cells shewed perfect spores. In Cerevisiae there were 
perfect spores in every cell. 
Green light. The sporulation rings of Ellipsoideus were 
slightly better marked ; but there were no perfect spores. 
The Cerevisiae did not shew any apparent change. 
Blue light. In both Ellipsoideus and Cerevisiae the appear- 
ance was the same as at 5.30 pan. ; the indications of 
sporulation were exceedingly faint. 
White light. In Ellipsoideus the sporulation appeared to be 
slightly more advanced, though not to The same extent 
as in the red ; whilst in the Cerevisiae about 40 — 50 °/ 0 of 
the cells had formed perfect spores. 
