PROCEEDINGS OF ^y. 

 THE ROYAL SOCIETY. 



VOL. XLVII. 



No. 291. 



CONTENTS. 



April 17, 1890. 



PAGE 



I. Preliminary Note on Supplementary Magnetic Surveys of Special Dis- 

 tricts in the British Isles. By A. W. Rucker, M.A., F.R.S., and T. E. 

 Thoepe, Ph.D., B.Sc. (Vict.), F.R.S 443 



II. The Variations occurring in certain Decapod Crustacea. — 1. Crangon 

 vulgaris. By W. F. R. Weldon, M.A., Fellow of St. John's College, 

 Cambridge, and Lecturer on Invertebrate Morphology in the University 445 



III. Observations on the Anatomy and Development of Apteryx. By T. 



Jeffery Parker, B.Sc, F.R.S. , Professor of Biology in the University 



of Otago, Dunedin, New Zealand 454 



IV. Notes on some peculiar Relations which appear in the Great Pyramid 



from the precise Measurements of Mr. Flinders Petrie. By Capt. 



I. On a Pneumatic Analogue of the Wheatstone Bridge. By W. N. Shaw, 



M.A., Lecturer in Physics in the University of Cambridge . . . 462 



II. On the Effect of Tension upon Magnetic Changes of Length in Wires of 



Iron, Nickel, and Cobalt. By Shelford Bidwell, M.A., F.R.S. . 469 



III. On the Heat of the Moon and Stars. By C. V. Boys, A.R.S.M., F.R.S., 



Assistant Professor of Physics, Normal School of Science and Royal 

 School of Mines, London 480 



IV. Observations on the Secretion of Bile in a case of Biliary Fistula. By 



A. W. Mayo Robson, F.R.C.S., Hon. Surgeon, Leed s G-eneral Infirmary, 

 Lecturer on Practical Surgery at the Yorkshire College, and Examiner 

 in the Victoria University 499 



List of Presents . . . . 524 



Bakerian Lecture. — The Discharge of Electricity through Gases. (Prelimi- 

 nary Communication.) By Arthur Schuster, F.R.S. . . . 526 



Index . . . . . . . . . . . . . . xix 



Title, Contents, &c. 



Downing, R.A. 

 List of Presents 



459 



459 



April 24, 1890. 



Price Four Shillings and Sixpence, 



July 17, 1890. 



