iv Proceedings. [Oc/obcr ij/h, iq/6. 



as to the necessity for close co-operation among various 

 researchers and as to the vital importance to the nation of the 

 c]ucstions inxolved, the adequate solution of which was a matter 

 for nnmediate government action. 



Ordinary Meeting, October i/th, igi6. 



The President, Professor SYDNEY J. HlCKSON, i\I.A., D.Sc, 

 F.R.S., m the Chair. 



Professor WILLIAM II. Lang, M.B., D.Sc, F.R.S., gave a 

 demonstration of a series of lantern slides illustrating the 

 mode of preservation and the structure of Khyma G-ii'vnne- 

 Vaiighani, from the Old Red Sandstone of Rhynie, Aberdeen- 

 shire. 



The chert in which the plant occurs was discovered by Dr. 

 Mackie, of Elgin, and the plant-remains are being studied by 

 Dr. R. Kidston, F.R.S., and Professor Lang, the results being 

 published by the Royal Society of Edinburgh. 



The slides showed the underground rhizomes attached to 

 the peaty soil by rhizoids, the branched cylindrical aerial stems 

 which were leafless, and the large cylindrical sporangia. The 

 internal structure is well preserved, so that our knowledge of 

 this ancient land plant is pretty complete. 



Khyjiia differs so much from other Vascular Cryptogams 

 that a new class, the Psilophvtales, has been founded to contain 

 it. 



General ^Nlceting, October 31st, igiC. 



Professor W- W. Haldane Gee, B.Sc, M.Sc.Tcch., 

 Vice-President, in the Chair. 



Mrs. M. Badger Craven, M.Sc, Demonstrator in 

 Chemistry, The Municipal School of Technology, 10, Birch 

 Grove, Ritsholnie, Manchester; and Mr. WILFRID ROBINSON, 

 M.Sc. (Mane), B.Sc. (Lond.), Lecturer in Economic Botany in 

 the Victoria University of Manchester, The Umversity, Man- 

 chester, were elected Ordinary ^vlembers of the Society. 



Ordinary Meeting, October 31st, igi6. 



Professor W.^W. Haldane Gee, B.Sc, M.ScTech., 

 Vice-President, in the Chair. 



Mr. C. E. Stromeyer, M.Inst.CE., AI.Inst.M.E., made a 

 short communication on a method of extracting square roots by 



