xiv. Proceedings. [February 8th, 1921. 



2. "Variation Of Sphceria. II. Sph. comeum (Linne)," by 



W. E. Alkins, M.Sc, and Maurice Cook, M.Sc. ; and 



3. "Variation of Sphceria. III. Sph. pallidum, Gray," by 



W. E. Alkins, M.vSc, and John Harwood, M.Sc. 

 These papers are printed in full in the Memoirs. 



General Meeting, February 8th, 1921. 



Mr. William Thomson, F.R.S.E., F.C.S., F.I.C. (Vice-President), 



in the Chair. 



Mr. Charles Norman Waters, A.K.C.Sc. (London), Dipl. Imp. Coll. 

 London, Research Chemist, The Chloride Electrical Storage Co., Ltd., 

 Manchester, 29, Carlton Road, Barr field Road, Irlams-o'tfi '.Height, 

 Manchester; and The Reverend Aloysitts Laurence Cortie, S.J., 

 F.R.A.S., F.Inst.P., President of the Manchester Astronomical Society, 

 Director of the Stonyhurst College Observatory, Stonyhurst College, 

 Blackburn; were elected Ordinary Members of the Society. 



Ordinary Meeting, February 8th, 1921. 



Mr. William Thomson, F.R.S.E., F.C.S., F.I.C. (Vice-President), 

 followed by Sir Henry Miers, M.A., D.Sc., F.R.S. (Presi- 

 dent), in the Chair. 



A vote of thanks was passed to the donors of the books upon 

 the table. These included : — " Collected Scientific Papers," by 

 John Henry Poynting (8vo., Cambridge, 1920), presented by the 

 Trustees of The Poynting Memorial Fund ; and " Meteorology 

 of the British (Terra Nova) Antarctic Expedition of 1910-13,^ 

 Vols. I and II (4to., Calcutta, 1919), presented by the Committee 

 for the Publication of the Scientific Results of the Captain Scott 

 Antarctic Fund. 



Professor F. E. Weiss, D.Sc, F.R.S., FX-S., exhibited and 

 commented upon some early specimens of White Butterbur 

 (Petasites albus) grown at Disley. Mr. James Grant, M.Sc.Tech., 

 F.I.C, quoted some local meteorological records of the last 

 month (January). 



Mr. Charles W. Duckworth, F.C.I.S., read a " Note on a 

 Unique Set of Hydrometers." 



The hydrometers referred to consist of the usual set of six 

 Twaddell's hydrometers for liquids heavier than water. There 

 is also one for lower specific gravities, viz., .625 to .850. 



These hydrometers were made by Mr. John Baptiste Ronchetti, 

 hydrometer and thermometer maker (by appointment) to Her 

 Majesty's Inland Revenue, Clayton, Manchester, about 45 years 

 ago. His workrooms were in a cottage in Ashton New Road, 



