Fourth Series. Vol. 5 : No. 2. 



MEMOIRS AND PROCEEDINGS 



OF 



THE MANCHESTER 

 LITERARY & PHILOSOPHICAL 



SOCIETY. 



1891-92. 



CONTENTS. 



Proceedings pp. iy 0f 172 



Microscopical and Natural History Section p. 173 



Memoirs : — 



On Iridescent Colours and a Method of examining' Iridescent 

 objects, Birds, Insects, Minerals, &c, so as to ensure 

 uniformity in their description. By Alex. Hodgkinson, 



M.B., B.Sc. p. 149 



Notes on some Ancient Dyes. By Edward Schunck, Ph.D., 



F.R.S. p . i S 8 



On the action of Acetic Acid, with oxidising substances, on 



Indigo Blue. By Charles O'Neill, F.C.S. - p. 162 



Annual Report of the Council - - - - - - - p. 174 



Treasurer's Accounts p. 192 



Annual Report of the Council of the Microscopical and Natural 



History Section .p. 195 



List of the Council and Members p. 198 



Title Page and Contents for the Volume. 



MANCHESTER: 

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