P. A. Levene and C. J. West 115 
found that the addition of 1 to 2 per cent of acetic acid to the 
alcoholic solution facilitated the reduction. With fairly con- 
eentrated solutions the hydrolecithin separates out during the 
course of the reduction. This product was brought into solution 
by warming, filtered from the coagulated palladium, cooled to 
0°, and the material which separated out crystallized from dry 
methyl ethyl ketone until the composition was constant. In 
most cases it was easily possible to obtain material with correct 
analytical figures for carbon and hydrogen. In some cases, how- 
ever, this was impossible, even after repeated crystallization. 
Hydrolecithin crystallizes well from methyl ethyl ketone, in 
which it is insoluble in the cold; it softens between 80 and 90°, 
turns brown about 100°, starts to melt about 200°, and runs 
down the tube, giving a dark red liquid, at 235°. The figures 
vary somewhat, depending upon the rate of heating. The opti- 
cal activity was determined in chloroform solution and varied 
between + 5.2° and + 5.4°. The presence of the amino nitro- 
gen-containing body did not seem to affect the value for [a]. 
mo. (820). 0.18" ; 
Sample 400 [o]? = SaraNanycory mam +5.4 
peng 2784 x 0,21" 
ees 0.5 X 0.3734 
= +5.22° 
9.2150 x 0.24° 
“ ROO lee te perianea  etinegs 
| Ip 0.5 < 0.4170 % 
*9,3805<.0.23° 
«  457[a], = = +5.20° 
ap = osx 04120 ~ t 
Analysis of these samples gave the following values: 
Sample. C H N Ve Ash. NH2—N 
per cent per ‘cent per cent per cent per cent per cent 
400 65.20 10.89 2.00 4.00 10.61 
399 65.59 11.16 2.37 3.85 10.38 
429 65.60 11.038 1.96 3.79 9.75 7.00 
508 65.50 11.30 1.80 3.90 — 20.00 
492 —— — 1.98 3.98 9.66 6.00 
Theory. | 65.37 11.23 1.74 3.84 0 
