14 



differs from leuco-aurine, however, by yielding a purple 

 solution on adding potassium ferricyanide to its alkaline 

 solution, whilst leuco-aurine under the same conditions is 

 oxidised to aurine, which dissolves in alkalis with a magenta 

 red colour. 



By passing sulphur dioxide into a hot alcoholic solution 

 of aurine, brick red crystals separate, being a compound of 

 aurine with sulphur dioxide. They do not smell of sulphur 

 dioxide, undergo no change when exposed to the air, and 

 are only decomposed at a temperature above 100°, when 

 they split up into sulphur dioxide and aurine. 



On mixing an alcoholic solution of aurine with a solution 

 of a bisulphite of the alkaline metals, the liquid becomes 

 colourless, a compound of aurine with the bisulphite being 

 formed, which by spontaneous evaporation of the solution, 

 is obtained in splendid, colourless, needles. These com- 

 pounds are decomposed by acids as well as alkalis. We 

 have not as yet analysed these different compounds, but 

 intend to do so, hoping thus to find the correct formula 

 for this remarkable compound. 



By heating aurine with alcoholic ammonia in closed 

 vessels to 110°, the so-called red coralline is obtained, a 

 body which has great resemblance to the yellow aurine, but 

 dyes a redder shade. This compound we have also obtained 

 in fine crystals. 



" Species viewed Mathematically." By T. S. Aldis, M. A. 



We have learnt that all energy is really one, whether 

 seen in heat, constrained position or motion. Many also 

 believe that life is really one, whether seen in man or a 

 toadstool. But for our part we have often felt a difficulty. 

 Wliy, if all life be one, do Ave not see it passing through 

 every variety of form instead of being restricted to certain 

 well defined types ? The present paper is an attempt to 

 explain this. 



Let us consider what Plato might have called the 



