On Ctiemical Composition of Aleur one- Grains. [Nov. 25, 



(7.) Soluble in saturated NaCl solution after ether or alcohol, — 

 Vegetable vitellin. 



b. Insoluble in 10 per cent. NaCl solution. Albuminates. 



(ex..) Soluble in 1 per cent. Na 2 00 3 solution. 

 (j3.) Soluble in dilute KHO. 



I have placed by itself the peculiar proteid which constitutes the 

 -crystalloids of Hicinus, and which occurs in the grains of Heli- 

 anthus, for, although, as I have previously pointed out, it resembles 

 myosin in its properties before treatment with alcohol and vitellin 

 after it, it differs from both these substances in that it is less readily 

 soluble in 10 per cent. NaCl solution. 



The following is an arrangement of the species examined according 

 to the solubility of the grains. It must be borne in mind, however, 

 that the observations upon which this arrangement depends are, 

 for the most part, simply microscopical, but the close agreement 

 between the results of microchemical and macrochemical methods in 

 the cases which have been given at length justifies an inference as to 

 the probable composition of a grain from the results of one method 

 only. 



Classification of Aleur one- Grains (Microchemical). 



I. Soluble in water : — 



Pasoma officinalis (type). Hanunculus acris. Aconitum Na- 

 pellus. Anemone Pulsatilla. Nigella damascena. Helleborus 

 foetidus. Amygdalus communis. Prunus cerasus. Pyrus malus. 

 Cynara Scolymus. Scorzonera hispanica. Leontodon Taraxacum. 

 Dipsacus Fullonum. Ipomcea purpurea. Phlox Drummondi. 

 Foeniculum officinale. Impatiens glandulifera. Vitis vinifera. 



II. Completely, and more or less readily, soluble in TO per cent. NaCl 



solution. 



a. Grains without crystalloids. 



(a.) Soluble in saturated NaCl solution after treatment with alcohol 

 or ether : — 



Lupinus hirsutus (type). Vicia Faba. Pisum sativum. Pha- 

 seolus multiflorus. Allium Cepa. Iris pumila (var. atrocceru- 

 lea). Colchicum autumnale. Berberis vulgaris. Althaea rosea. 

 Tropaeolum majus. Mercurialis annua. Empetrnm nigrum. 

 Primula officinalis. 



(/3.) Soluble in saturated NaCI solution after alcohol, but not after 

 ether : — 



Helianthus annuus (type). Platycodon (Wahlenbergia) grandi- 

 flora. Erodium gruinum. Sabal Adansoni. Delphinium car- 



