CONTENTS (continued). 



March 28, 1878. 



PAGE 



I. On Putrescent Organic Matter in Potable Water. II. By GriTSTAV . 



Bischop .258 



II. On the Modifications of the Simple and Compound Eyes of Insects. By 

 B. Thompson Lowne, F.R.C.S., Lecturer on Physiology at the Middle- 

 sex Hospital Medical School, Arris and Grale Lecturer on Anatomy and 

 Physiology in the Royal College of Surgeons ...... 261 



III. Measurements of Electrical Constants. No. II. On the Specific Inductive 



Capacities of Certain Dielectrics. By J. E. H. G-ordon", B.A. Camb. 

 First Series . .... . .' . . ... .270 



IV. On the Placentation of the Apes, with a Comparison of the Structure of 



their Placenta with that of the Human Female. By William Turner, 

 M.B. Lond., F.R.S., Professor of Anatomy in the University pf Edin- 

 burgh . . . . - . . . . . . . . 271 



y. On the Thermo-Electric Properties of Liquids. By Gr. GrORE, LL.D., F.R.S. 272 

 List cf Presents . . . 273 



Researches in Spectrum Analysis in connexion with the Spectrum of the Sun. 



By J. N. Lockyer, F.R.S. .'■ '. .279 



ERRATUM. 



Throughout Plate 4 the letter x ought to match in size the letter «. 



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Yols. 1 to 7, 4to, always on Sale, and may be obtained through any bookseller. 

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Yol. 8, a continuation of the work (1861-1873) is now in the press. 



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