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Contents. Bibliography List of Illustrations (In certain versions of this etext [in certain browsers]clicking on the image will bring up a larger version.) Index:A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,Y,Z (etext transcriber's note)

PEARLS AND PARASITES

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PEARLS & PARASITES

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BY ARTHUR E. SHIPLEY
Of Christ’s College, Cambridge; M.A., Hon. D.Sc., F.R.S.

WITH ILLUSTRATIONS


LONDON
JOHN MURRAY, ALBEMARLE STREET, W.
1908

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TO MY SISTER

E.   D.   H.

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PREFACE

Most of the following essays have appeared in the pages of theQuarterly Review, and I am greatly indebted to the editor and to theproprietor of that periodical for permission to reprint them. Thearticle on ‘The Infinite Torment of Flies’ is an address I deliveredbefore the British Association at Pretoria in 1905, and the eighth essayappeared in Science Progress.

As far as possible I have tried to avoid the use of long words, and thusescape the censure of recent critics in the Times; but I fear I havenot altogether succeeded, and my excuse must be that with newdiscoveries new conceptions arise, and these conceptions require newnames, or we cannot talk or write about them with any precision.

The essay dealing with zebras and hybrids was the first to be written,and appeared before the rediscovery of Mendel’s remarkable work, andmust be regarded as a pre-Mendelian contribution to a subject which hasrecently, in connexion with the Deceased Wife’s Sister Bill, againaroused attention. Had

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