No. September 1927

The British Journal of

Experimental Biology

J. BARCROFTA. J. CLARK

EDITED BY

J. GRAY

WITH THE ASSISTANCE OF

F. A. E. CREWJ. B. S. HALDANE J. S. HUXLEY

THE COMPANY OF

BIOLOGISTS LIMITED.

W. H. PEARSALLL. T. HOGBEN C. F. A. PANTIN J. T. SAUNDERS

Qontents

EDUARD UHLENHUTH and SAUL SCHWARTZBACH, The Morphology and Physiologyof the Salamander Thyroid Gland:

I I . The Anterior Lobe of the Hypophysis as a Control Mechanism of theFunction of the Thyroid Gland . . . . . . . .

JOSEPH NEEDHAM, The Energy-sources in Ontogenesis:

V. The Carbohydrate Metabolism of the Developing Avian Egg .

VI. The Relation between Combustion, Constitution, and Concentration inthe Developing Avian Embryo . . . . . . . .

JOSEPH NEEDHAM, The Developmental Efficiency of the Avian Embryo

LANCELOT T . HOGBEN and KATHLEEN F . PINHEY, Some Observations on theHaemocyanin of Limulus . . . . . . . . .

J. ARMITAGE ROBERTSON, Galvanotropic Reactions of Polycelis nigra in Relation toInherent Electrical Polarity . . . . . . . . .

J. BELEHRADEK and J. S. HUXLEY, The Effects of Pituitrin and of Narcosis onWater-regulation in Larval and Metamorphosed Amblystoma

Published for The Company of Biologists Limitedby THE CAMBRIDGE UNIVERSITY PRESS

LONDON : Fetter Lane, H.c. 4also

H. K. LEWIS * CO., LTD., 1 3 6 , COWER STREET, LONDON, W.C. IWHELDON AND WESLEY, LTD., 2 - 4 , ARTHUR ST., NEW OXFORD ST., W.C.Z

BOMBAY, CALCUTTA, MADRAS: MACMILLAN & CO., LTD.TOKYO: THE MARUZEN-KABUSHIKI-KAISHA

PAGE

27

43

55

66

Price 125. bd. net Subscription per volume 40J. netPRINTED IN GREAT BRITAIN

Notice to authors of papers intended for publication in this JournalThe British Journal of Experimental Biology will publish contributions in experimental biology andcomparative physiology, whether zoological or botanical. Every paper must contain a summaryof the chief results of the enquiry. Authors are requested to present their work in as concise a formas possible. They will receive 50 copies of their papers free; additional copies, not exceeding 100(except in special cases), may be purchased and should be ordered when the proofs are returned tothe Editor.

Contributors can avoid delay in the publication of their work by con-forming with the following arrangements:

MANUSCRIPTS :MSS. should be typewritten on one side only of the paper, and the pages should be numbered. Allparagraphs to be printed in small type should be indicated by adding a line at the side of the copy.Tables and Legends should be on separate sheets from the rest of the MS. and should be numbered.The place where they are to be inserted in the text should be indicated in the margin of the MS.Bibliography should be given under the heading of "References" and in the following form: Sur-name of authors (in alphabetical order), initials, date of publication, title of journal, volume and pageof reference. The title of the paper will be printed if the author so desires. In the text a referenceshould be quoted by the author's name and date (in brackets), and not by the numerical order of thepaper in the list of references. All names of journals and books will be printed in italics.

ILLUSTRATIONS :(i) Plates. Drawings should be executed on white drawing paper or card (yellowish backgroundsshould be avoided), and gummed on white card grouped and numbered in the order in which theyare to appear in the published plate. Exclusive of margin the plate-figures should not cover, whenreduced, an area greater than 7J ins. in length x 5 ins. in width when ready for reproduction as asingle plate or 74 ins. x 11J ins. in the case of double plates. All lettering should be put in faintlywith pencil. For the reproduction of photographs by the half-tone process a good glossy bromideprint is required. All lettering to appear on photographs should be shown in position on a coveringsheet of transparent paper. If a part only of the photograph is required it should be indicated in thesame way.(ii) Line blocks should be used whenever possible. Illustrations should be pen drawings in Indianink (jet black and water-proof) on smooth white Bristol board, the lettering being temporarily andlightly put in by the author with a soft pencil. It is best for the author to allow the skilled draughts-man or type-setter to deal with the final lettering. The size of the lettering inserted into the originaldrawing should be graded according to the degree of reduction that is desired in the final repro-duction. All brush work, tinting, or pencil shading is to be avoided. Where considerable reduction isrequired, it is essential that the drawing should be of such a character as to bear such reduction.Authors should state in what ratio the figures are to be reduced (£, J, i, as the case may be).Text-figures, when reduced, should not occupy a space greater than the length and width of theprinted surface of a page, i.e. 7 inches long by 4J inches (17-5 x 12 cm.) wide including space forthe accompanying legend.

Charts and Curves are frequently drawn to best advantage on graph paper ruled in pale bluesince, whilst ensuring accuracy, the blue lines do not appear in the photograph, only the blackenedlines that are desired remaining.

PROOFSHEETS :Authors will receive one set of slip proof for correction and return to the Editor. A page proof willalso be sent if the slip proof is marked by the author 'Revise.' An allowance often shillings per sheetof sixteen pages will be made for alterations apart from printer's errors. Authors will be chargedfor any excess over this average.

All communications should be addressed to the Editor,J. GRAY, King's College, Cambridge

THE SOCIETY FOR EXPERIMENTAL BIOLOGYThis Society exists for the promotion of intercourse between experimental biologistswithin the United Kingdom. The British Journal of Experimental Biology is the officialmedium of publication of the Society. Applications for membership should be addressedto the Secretaries:

R. RUGGLES GATES, King's College, London,C. F. A. PANTIN, Marine Biological Laboratory, Qtadel Hill, Plymouth.