SUMMARY OF RESULTS OF ANALYSES. 959 



a beaker with alcohol and transferred to the crucible through which the alkali ex- 

 tract had beeu refiltered. After displacing the alcohol with ether, the residue was 

 dried at 110 C., weighed, ignited, and weighed again. The difference = the weight 

 of crude fiber. 



SUMMARY OF RESULTS OBTAINED BY VARIOUS ANALYSTS. 



A summary of the results of analyses by various chemists is presented 

 in the tables given below. These analyses were obtained, for the most 

 part, from Ko'nig's Chemie der menschlichen Nahrungs- und Genuss- 

 mittel, 3 Aufl., Band I. The tables of analyses given by Kb'nig are 

 abridged here, by giving only the means, maxima, and minima of the 

 results reported by each analyst on the same class of .samples. It is 

 believed that the tables, with appended notes, will be found self-explan- 

 atory. 



As will be seen by reference to the tables, most analysts have reported 

 the percentage of total nitrogenous matter, including theobromine. 

 This figure is obtained by multiplying the per cent of total nitrogen by 

 6.25. This factor assumes the per cent of nitrogen in albuminous mat- 

 ter to be 16 per cent. Theobromine contains 31.1 per cent of nitrogen. 

 The per cent of nitrogenous matter, including theobromine, can, there- 

 fore, be changed to the approximate per cent of nitrogenous matter, 

 not including theobromine, by subtracting twice the percentage of 

 theobromine from the number given as nitrogenous matter, including 

 theobromine. 



The percentages of theobromine, reported by Zipperer are considered 

 too low by many authorities. This seems to be due to imperfect ex- 

 traction of the theobromine by the method he used. (For the details of 

 the method see page 953.) 



The tables given on pages 967 and 968 will be found to contain inter- 

 esting data concerning the quantitative relations of the constituents of 

 the cocoa bean and its preparations. Bensemann also reported analyses 

 of the ashes of the same samples, the results of which are given on page 

 969. 



