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367 
oxide, it is then filtered through the same filter as the first 
and well washed. All the non-albuminoid nitrogenous 
matter is removed leaving on the filter only the albuminoid 
nitrogen, which in the tables given I have termed true al- 
buminoids. 
This method is not a perfectly satisfactory one, as has 
been demonstrated by Dr. Newbury! and others. J. M. 
Bartlett? found that when a larger quantity than 0.3 to 0. 
4 grams of cupric-hydrate was used better results were ob- 
tained,and this has been my experience. So that about 0.7 
grams were added. When 0.7 grams cupric-hydrate are 
added the filteration is less difficult than with a smaller 
quantity, but the precipitate when dried is a very hard horn 
like mass, difficult of pulverization, and has been a source 
of difficulty in nitrogen determination by combustion. This 
difficulty is obviated by Kjeldahl’s method, which has been 
found more satisfactory for all ordinary nitrogen deter- 
minations than the soda lime method. 
ALBUMINOID AND NON-ALBUMOID NITROGEN. 
Per 
cent of to- 
Albu- tal nitro- 
Total minoid Amide gen in 
nitro- nitro- nitro- amide 
Name. Date. gen. gen. gen. form. 
- Grasses. 
Bm ect VOIUAl ce sce ss June 4 1.03 97 .06 5.82 
Pe -eVO UAISICS 2... oss 2 Mt ey | 95 .50 45 47.37 
SeEELOTCUNS  . te se. ont als 1.20 1.13 OF 58.33 
4 Medium red clover...... aw 9 2.40 1.92 48 20.00 
GEAR CLOMED Do. oy.) we a 3 5 ones eg 2.58 2.05 .53 20.54 
RAVE CLOWET i.) ad. 5. « erie Be 3.25 1.18 2.07 63.59 
MIDUROITIO fe 8 a 2 wc se anetp Pos 2.40 1.72 .68 28.33 
8 Lucerne, 4th cutting....... 3.75 2.21 1.54 41.07 
9 Bokharas clover. ......... July 1 1.83 1.42 41 22.40 
10 Bokhara clover 2d crop . 
(before bloom)......... ‘eid 2.50 94 1.56 62.40 
die Siow trefoil . as. . 6 vs June 11 2.52 1.75 78 30.83 
WP OLHY Es te. he ss v= oy 7 28 75 .38 87 49.33 
13 Wood meadow grass....... eee Lt) 1.03 87 .16 15.53 
14 Rough-stalked meadow.... ‘‘ 19 1.40 Ol 79 56.42 
15 Bennett’s native wild...... ES 1.25 .86 39 31.20 
16 Fort Bellingham......... pelo 1.25 Mey .38 30.40 
UE EL a aa 1.68 1.30 88 22.61 
ite all meadow oat. 4.0.02, ¢° 9 1.08 92 .16 14.81 
Riana doe se, 0. «sO ‘Meee PeLB yy eked oe gad 62.71 
20 Meadow fescue........... he 1.25 1.08 219, 13.60 
Mee OICUPING,. «onus Ge... #5 sag 1.55 1.23 382 20.64 
Say ess Oricheat. . oi... 0... a. oe 1.28 43 85 66.40 
MONE TAG Be. hk tess. deg 1.73 1.138 60 35.61 

t Cornell University Experiment Station Report 1882-8. 
* Maine State College Report, 1888, p. 25. 
