Page:Proceedings of the Royal Society of London Vol 69.djvu/471

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A List of the Presents received was laid on the table, and thanks ordered for them.

The following Papers were rend :

I. " On Pure Cultures of a Uredine, Pnrcinia (Utperxi (Eriks.)." By Professor MARSHALL WARD, F.R.S.

II. " On the Physics and Physiology of Protoplasmic Streaming in Plants." By Dr. A. J. EWART. Communicated by Professor GOTCH, F.R.S.

III. " On a Pair of Ciliated Grooves in the Brain of the Ammocoete,

apparently serving to promote the Circulation of the Fluid in the Brain-cavity." By Professor A. DENDY. Communicated by Professor HOWES, F.R.S.

IV. " On the Interpretation of Photographic Records of the Response

of Nerve obtained with the Capillary Electrometer." By G. J. BURCH, F.R.S.

V. "Note on the Anomalous Dispersion of Sodium Vapour." 'By Professor W. H. JULIUS. Communicated by Professor C. V. BOYS, F.R.S.

VI. "Note on Mr. Bateson's Paper, 'Heredity, Differentiation, and other Conceptions of Biology: a Consideration of Professor Karl Pearson's Paper " On the Principle of Homotyposis." ' By Professor KARL PEARSON, F.R.S.

During the course of a long series of experiments, designed to seek further information regarding the relations between the host and the parasite, in the case of certain species of Bromm and the Rust-fungus, Puccinia dispersa (Eriks.), it fell out that a simple method of obtaining pure cultures of both host and parasite was attainable.