VALUE AS FOOD. 69 



food to which may be applied the appar- 

 ently strange and paradoxical qualification 

 morally improving food. We have just 

 shown that this qualification suits it in all 

 respects. It is proved, beside, that cocoa 

 enters too largely into popular consump- 

 tion, that it forms too great an addition to 

 the sum of the food substances already ex- 

 isting, for it to be reckoned henceforth 

 among luxuries subject to sumptuary 

 laws." 



Dr. Edmund A. Parkes, F.R.S., in his 

 " Manual of Practical Hygiene, prepared 

 especially for use in the Medical Service 

 of the Army" (London, 1864), says: 



u Although the theobromine of cocoa is 

 now known to be identical with theineand 

 caffeine, the composition of cocoa removes 

 it widely from tea and coffee. The quan- 

 tity of fat varies even in the same sort of 

 cocoa. The ash contains a large quantity of 

 phosphate of potash. The larger quantity 



