via CONTENTS OF VOL. XXVI. — THIRD SERIES. 



NUMBER CLXX VI.— SUPPLEMENT TO VOL. XX VL 



Page 

 Mr. G. B. Jerrard's Reflections on the Resolution of Algebraic 



Equations of the Fifth Degree 545 



Mr. Warington on the Distilled Waters of our Pharmacopoeias 574 

 Mr. Warington on some commercial Specimens of Green Glass 578 

 Drs. J. S. Muspratt and A. W. Hofmann on certain Processes 



in which Aniline is formed 581 



Mr. Mallet on the Brittleness and Non-plasticity of Glacier Ice 586 



Mr. Hopkins's Remarks on Professor Forbes's Reply 593 



Mr. B. Boughey on the Rule for obtaining the Atomic Volume 



of Elementary Substances 600 



Dr. Hare's Remarks made at a late meeting of the American 

 Philosophical Society, on a recent speculation by Faraday on 



Electric Conduction and the Nature of Matter 602 



Proceedings of the Cambridge Philosophical Society 607 



Colouring matter of Flint, Carnelian and Amethyst 613 



Antirrhinic Acid 613 



On Plumbic Acid and Plumbates 613 



Preparation of Minium by double decomposition 614 



On the Composition of the Crystallized Hydrates of Barytes 



and Strontia, by M. Filhol 615 



On the Conversion of the Essential Oil of Mustard into the Es- 

 sential Oil of Garlic, by Charles Gerhardt 616 



Automaton Speaking Machine , 618 



Index 619 



PLATE 



Illustrative of Prof. Forbes's and Prof. Gordon's Communications on the 

 Motion of Flowing Pitch, as confirming the Viscous Theory of Glaciers. 



Errata and Addenda. 



Page 15, line 'i,for u sin « read u (sin a, — sin /3) = a sin a. 



... 378, Figure 5. is printed in an inverted position. 



... 384, par. 3, line 15, before ''then" add, " and multiplying by a the 

 term from which ec, disappears and all the terms which 

 follow that one," 



... 451, line T,for ammonium read aluminum. 



... 456, at the end of the article of intelligence on the discovery of Mas- 

 todon Bones in New Jersey, beginning at p. 453, add, Pro- 

 ceedings of the American Philosophical Society/, vol. iv. p. 118. 



