NOTICE. 



The Editor regrets that, owing to unexpected delays, he 

 is unable to issue the coloured chart illustrating Dr. Hodgkin- 

 son's paper on "The Structure of Coloured Bodies" with the 

 present number of the " Memoirs and Proceedings." It will, 

 however, be included with the next number (which the Editor 

 hopes to issue in a week or two) in position for binding. 

 An uncoloured proof of the chart (to be re-placed by the 

 coloured one) is issued with the present number. 



