348 



THE MICROSCOPE. 



that the diseased potatoes contain a larger proportion of 

 water than those that are healthy. A want of organizing 

 power is evidently the cause of this deficiency of starch ; 

 but we fear the microscope will never tell us in what the 

 want of this organising force consists." 1 



The adulteration of articles of food and drink has long 

 been a matter of uneasy interest, and of strong, though 

 vague, misgiving. Accum's Death in the Pot, between 

 thirty and forty years ago, awoke attention to the subject; 

 which has since been more or less accurately explored by 



Fig. 193. — Sample of Coffee, adulterated with both Chicory and Roasted 

 Wheat. (After Hassall.) 



a a a, small fragments of coffee; bbb, portions of chicory; ccc, starch-granules 



of wheat. 



Mitchell, Normandy, Chevalier, Jules Garnier, and Harel; 

 and has at length derived a singularly lucid exposi- 

 tion from Dr. Hassall's researches, whose report of these 

 inquiries fills between 600 and 700 closely printed pages 



(1) Professor Quekett's Histology of Vegetables. We would refer the reader 

 to a curious work on Fungi, by Arimini, an ItaJian botanist, 1759. 



