THE 



SCIENTIFIC PHOCEEDIJSGS ., 



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L pro o 41925 -^i 

 ROYAL DUBLIN SOCIEIV. " ^./ 



Yol. XVII, If.S., Jfos. 42-47. ATJ&UST, 1924. 



42.— EXPERIMENTS ON THE POSSIBLE EFFECT OF VITAMINS ON 

 QUANTITY OF MILK AND BUTTER FAT. By E. J. Sheeht, 

 F.R.C.Sc.I, B.Sc, M.R.I.A, Bio-Chemical Laboratory, D.A.T.I. 



4a.— A MECHANICAL DEVICE FOR SEALING OFF RADIUM EMANA- 

 TION TUBES. By H. H. Poole, Sc.D. 



44.— NOTES ON THE FILTRATION AND OTHER ERRORS IN THE 

 DETERMINATION OF THE HYDROGEN ION CONCENTRATION 

 OF SOILS. By AV. R. G. Atkins, Sc.D. 



45.— VARIATIONS IN THE PERMEABILITY OF LEAF-CELLS. By 

 Henry H. Dixon, Sc.D., F.R.S., Professor of Botany in the University 

 of Dublin. 



46._NOTES ON ACARINE OR ISLE OF WIGHT BEE DISEASE. By 

 LiEUT.-CoLONEL C. Samman, R.A.M.C. ; and J. Beonte Gatenby, M.A. 

 (DuBL.), D.Phil. (Oxon.), D.Sc. (Lond.), M.R.I.A., F.R.M.S., Professor 

 of Zoology and Comparative Anatomy in the University of Dublin. 

 (Plates XVIII and XIX.) 



47._N0TB ON A PHYSICAL METHOD OF SEPARATING THE FATS 

 IN BUTTER-FAT. By Felix E. Hackett, M.A., Ph.D., Professor of 

 Physics, College of Science, Dublin; and T. A. Crowley, A.R.C.Sc.L, 

 Assistant-Demonstrator, College of Science, Dublin. 



lAuihors alone are responsible for all opinions expressed in their Communications.] 



DUBLIN : 



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l.EmSTEK HOUSK, DUBLIN. 



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H, HENRIETTA STREET, COVENT GAIIDEN, LONDON, W.C. 2. 



1924. 



Price Four Shillings. 



