SECT. V. ALBUMEN. 



Gluten has been detected, under one modifica- 

 tion or other, in a very considerable number of 

 vegetables or vegetable substances, as weir as in 

 the flour of wheat. Rouelle, the younger, showed 

 that it exists in the green fecula of plants ; and 

 Proust found it in the following grains and fruits : 

 Peas, Beans, Barley, Rye, Acorns, Chesnuts, Horse- 

 Chesnuts, Apples, Quinces, Elder-berries, Grapes. 

 He found it also in the leaves of Rue, Cabbage, 

 Cresses, Hemlock, Borage, and Saffron, and in the 

 petals of the rose. 



It is unquestionably one of the most important Uses, 

 of all vegetable substances, as being the principle 

 that renders the flour of wheat so fit for forming 

 bread, by its occasioning the panary fermentation, 

 and making the bread light and porous. It is used 

 also as a cement, and capable of being used as a 

 varnish, and a ground for paint. 



SECTION V. 

 Albumen. 



ALBUMEN, which is a thick, glary, and tasteless Proved to 

 fluid resembling the, white of an unboiled egg, is getables. 

 a substance that has been but lately proved to exist 

 in the vegetable kingdom. Its existence was first 

 announced by Fourcroy, and finally demonstrated 

 by the experiments of Vauquelin on the dried juice 



