370 BULLETIN OF THE BUSSEY INSTITUTION. 
which they severally contain, it would be more reasonable to contrast , 
apples with turnips than with potatoes; though, as has been shown 
already, the remarkably small proportion of nitrogen in the apple 
distinguishes it clearly from the turnip and allied roots, as well as from 
most other kinds of fodder. 
The only kind of fodder equally poor in nitrogen which has fallen 
under my notice, is the curious edible fungus known as tuckahoe, or 
Indian bread (Pachyma Cocos), which grows in our Southern Atlantic 
States, beneath the surface of the ground, and which is said to be sought 
for and eaten by hogs,* as well as by the Indians and by negroes. A 
specimen of this fungus was analyzed in the laboratory of the Bussey 
Institution in the winter of 1874-75, according to the method usually 
employed for the analysis of fodder, as cited above. The sample in 
question consisted of a number of good-sized, sound pieces of the sub- 
stance, selected from the Curtis collection of fungi. The dark-colored 
cortical portion of the fungus was cut off and rejected, and the internal 
white matter was ground to fine powder and thoroughly mixed. 
The results of this analysis were as follows :— 
In the air-dried In the “ dry sub- 
sample. stance’’ of the 
tuckahoe. 
Water (at 110°C.) 5°15). foe! we, ba tee ce eee peepee 
Ash (free from C & CO,).. .. 12 65 6 ue eee 0.28 
AIDAMINOIUS’ 5) cs aus. s | Se ee ne 1.61 
Carbohydrates (including fat) . . . . 74.07 86.64 
Celluloset (freefromash) ... .. 9.80 11.47 
100.00 100.00 
Dry organic matter . . . .. =. - . 85.25 plus ash == 85:49 
ee eee ee LAS OR ha Rae Sa OT REO ee tae 
INitPO MEM ere ek. hel. to Rp URE Weld yw jive lh stp Ue = Cae 
CPT, BRED eect ane eet lke Ate dh cheats rte del ae 
* C. W. Johnson’s ‘‘Farmer’s and Planter’s Encyclopedia of Rural 
Affairs,” adapted to the United States, by Gouverneur Emerson, 1855, p. 1056. 
This fungus is found in the northern part of China also, and is there largely 
used as a drug and an esculent. See “American Journal of Science,” 1859, 
27. 438. 
+ The substance here recorded as cellulose, which was, of course, the residual 
matter that had resisted the action of weak acid and alkali, applied in the usual 
methodical way for the purpose of removing carbohydrates and albuminoids, 
differed in appearance and somewhat in behavior from that ordinarily obtained 
from fruits and herbs. While yet moist, the tuckahoe cellulose was a voluminous 
white pulp, but on drying it shrunk to a dark, tough, horn-like mass. On boil- 
ing a quantity of the product prepared by the analytical process with fresh por- 
