EEPORT OF THE CHEMIST, 

 Analysis of sweet-corn cobs. 



99 



Constituents. 



IMoistuie 



Ash , 



Cellulose 



Oils 



Su{;ai-s, &c* 



Zein , 



Albumen 



Gum 



Starch isotuersl 

 Alkali extract^ 



Adam's early cobs. 



Air-dry. Dry. 



12.40 

 2.45 



22.74 

 1.84 



13. 28 

 2.75 

 2.68 

 1.10 



25.01 



15.75 



100. 00 



2. 80 



25.9ti 



2.10 



15.16 



3.14 



3.06 



1.25 



28.55 



17.98 



100. 00 



Mammoth sugar 

 cobs. 



Air-dry. Dry 



7.51 

 2.28 



18.18 

 1.62 



12. 68 



1.50 



3.75 



.96 



27.95 



23.57 



100. 00 



2.47 

 19. G6 

 1.75 

 13.71 

 1.63 

 4.05 

 1.04 

 30.22 

 25.48 



100. 00 



lu order that a general idea may be had, at a glance, of the probable 

 food value for animals of sweet corn and the cobs from wbich it is taken, 

 the substances usually considered to have equal food value will be 

 grouped together. 



These substances are, iu the corn itself — 



1. Albuminoids, including zein and albumen. 



2. Carbhydrates, including sugars, gum, aud starch. 



3. Oils, commonly called "fats." 



In the corn-cobs — 



1. Albuminoids, zein, and albumen, as in corn itself. 



2. Carbhydrates, sugars, gum, starch-isomers, and alkali extract. 



3. Oils, as in corn. 



All comparisons are on dry samples. 



Digestible nutrients in siveet corn and cols. 



Constituents. 



Albuminoids.. 

 Carbhydrates . 

 Fat. 



Nutri tiro ralio§ 



Calculated value per hundred pounds on dry substance 



Calculated value per hundred pounds on air-dry substances. 



Corn. 



17.04 



71.64 



4.56 



1:4.5 



1.63 



1.49 



16.37 



70.86 



5.99 



1:4.7 



1.64 



1.46 



Cobs. 



6.20 



62.94 



2.10 



1 : 10. 5 



.96 



.84 



5.67 

 70.45 

 1.75 

 1 : 12. 7 

 .99 

 .92 



In absence of proof as to the value of "alkali extract" in corn-cobs, 

 it has seemed best to give a calculation in which it is not included. The 

 value of " starch- isomers " would seem to be less doubtful, as they are 



*Est!matcd liy difference. 



tSolul)le in 80 per cent, alcohol and soluble in water. 



•l^^i?!^ ^itiacting with ether, alcohol, and Tvater, the .sainiilo wa.s treated at 100° C. for about six hours 



§ By nutritive ratio is meant tlio proportion of nitrogenous to non-nitrogenous nutrients, 



