Ill 
The Three-line Determinants of a Six-by-Three Array. By Thomas 
Muir, LL.D. Issued separately January 20, 1905, 
The Sum of the Signed Primary Minors of a Determinant. By Thomas 
Muir, LL.D. Issued separately January 20, 1905, 
Crystallographical Notes. By Hugh Marshall, D.Sc., F.R.S. Issued 
separately February 1, 1905, ...... 
The Effect of Simultaneous Removal of Thymus and Spleen in young 
Guinea-pigs. By D. Noel Pat on and Alexander Goodall. {From the 
Laboratory of the Royal College of Physicians , Edinburgh.) Issued 
separately February 1, 1905, ...... 
Networks of the Plane in Absolute Geometry, By Duncan M. Y. 
Sommerville, M.A., B.Sc., University of St Andrews. {Abstract.) 
Communicated by Professor P. R. Scott Lang. Issued separately 
February 1, 1905, ....... 
A Specimen of the Salmon in transition from the Smolt to the Grilse 
Stage. By W. L. Calderwood. (With Two Plates.) Issued separately 
February 1, 1905, . . 
A Comparative Study of the Lakes of Scotland and Denmark. By 
Dr C. Wesenberg-Lund, of the Danish Fresh- water Biological Station, 
Frederiksdal, near K. Lyngby, Denmark. Communicated by Sir 
John Murray, K.C.B., F.R.S. {From the Banish Fresh-water Biological 
Laboratory, Frederiksdal.) (With Two Plates.) Issued separately 
March 3, 1905, ........ 
Variations in the Crystallisation of Potassium Hydrogen Succinate due 
to the presence of other metallic compounds in the Solution. {Pre- 
liminary Notice.) By Alexander T. Cameron, M.A. Communicated 
by Dr Hugh Marshall, F.R.S. Issued separately February 4, 1905, . 
A Laboratory Apparatus for Measuring the Lateral Strains in Tension 
and Compression Members, with some Applications to the Measure- 
ment of the Elastic Constants of Metals. By E. G. Coker, M.A. 
(Cantab.), D.Sc. (Edin.), F.R.S.E., Professor of Mechanical Engineering 
and Applied Mathematics, City and Guilds Technical College, 
Finsbury, London. (With a Plate.) Issued separately March 3, 
1905, ......... 
On Astronomical Seeing. By Dr J. Halm, Lecturer in Astronomy in 
the University of Edinburgh. Issued separately March 3, 1905, 
On the Graptolite-bearing Rocks of the South Orkneys. By J. H. 
Harvey Pirie, B.Sc., M.B., Ch.B. Communicated by Dr Horne, 
F.R.S. With a Note by Dr Peach on Specimens from the South 
Orkneys. Issued separately March 30, 1905, .... 
A Possible Explanation of the Formation of the Moon. By George 
Romanes, C.E. Issued separately March 30, 1905, 
On Pennella : a Crustacean parasitic on the Firmer Whale {Balcenoptera 
musculus). {Abstract.) By Sir William Turner, K.C.B., LL.D. 
Issued separately March 30, 1905, ..... 
The Diameters of Twisted Threads, with an Account of the History of 
the Mathematical Setting of Cloths. By Thomas Oliver, B.Sc. 
(Lond. & Edin.). Communicated by Dr C. G. Knott. Issued separ- 
ately April 8, 1905, ....... 
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