370 The British Association at Winnipeg. 
formed : the rate of fall: the path of the falling spores, &c. The 
paper was fully illustrated by models, diagrams, slides, &c. It was 
mainly a resume of some of the more important results contained in 
Dr. Buller’s recent book “ Researches on Fungi.” 
Professor J. B. Overton (of Wisconsin) gave an account of his 
work on the nuclei of Podophyllum peltatum. Professor Overton 
carefully traced the changes in the telophase chromosomes during 
their passage into the resting nucleus. He found that they undergo 
progressive internal vacuolization, and so become much enlarged. 
Each chromosome finally consists of a reticulum of linin, supporting 
the chromatic granules. The author, who is strongly convinced of 
the “ individuality of the chromosomes,” believes that the resting 
reticulum is composed of a number of these independent, elementary 
reticula. 
Dr. H. C. I. Fraser read a paper on “The Nuclear Phenomena 
of Ascomycetes, and their Relations to Heredity.” Various types 
of fertilisation, both normal and degenerate, were described. In all 
cases fertilisation is followed by a second (asexual) fusion of nuclei 
in the ascus. Both fusions are followed by reduction divisions, but 
these differ in character in the two cases. 
Mr. Harold Wager, in collaboration with Miss Peniston, gave 
an account of the nucleus of the Yeast plant. The position taken 
up by the authors is substantially the same as that of an earlier 
paper by Mr. Wager (1898). In brief, this is that the nuclear 
apparatus of the yeast cell consists of a nucleolus, in contact with 
a vacuole, the latter being surrounded by a chromatin network. A 
number of further points, however, were elaborated in this paper. 
For instance, the amount of chromatin present appears to vary with 
the state of metabolic activity of the cell. There is some reason to 
think that the nuclear vacuole may play an important part in the 
elaboration of chromatin. 
Papers were also contributed by Dr. R. R. Gates, on the effect 
of tropical conditions on the growth of some English Oenotheras, 
and by Professor H. L. Bolley on the control of weeds by means 
of chemical sprays. 
Excursions. 
During the meeting several botanical excursions were arranged 
by Professor Buller. The first of these was to the shores of Lake 
Winnipeg, where some fine poplar forests and marshes were 
examined. Other excursions were to Elm Park on the Red River 
