NOTES
I 126
T A B L E 111. Material
KO.
I 2
3 4 j
6
7 8
Itour, no niinutesniitl to lilearli 5 j . y ,. ,, ., ........ ', )' 56.33 a. , , ............... and to bleacli 56.40 ', .............. , ' . , ,. . , , , " " 54 79 Red cedar, .............. . , ~, j o triinutes and to I)leack 32.04 c, , , ', .' .L .. ' I 41..5[ '' lieartwood.. . . . . . . . . . . . . I , . < ,. , s ,,
XI
I
1 1
I .
I ,
* &
( /
"
/.
/ .
. %
,,
~8
9 Red spruce IO
i'erceiit. of Celliilose
Chlorinations
White oak, sapwootl.. . . . . . . . . . . . .
"
.*
"
Cherry, sapwood
..............
/ .
..............
1,
............ " .................
5 '
,. ,c
,,
/ .
*.
42.52
c ,
43.00 m i n u t e s and to bleach 58.9 j c < ,, c , * ' jS.60 and to bleach 54.72 IO
* I
' # ,' " 12 54.43 T h e final products were all pure white, and none of them gave the lignin reaction lvith phloroglucinol and hydrochloric acid. I n conclusion, we desire to acknowledge our indebtedness to N r . C. Parmelee for valuable assistance given us in the analytical work. "
( (
.I
$ 1
F R O M T H E 1 , A B O R A T O R Y OF P L A N T P H Y S I O L O G Y .
Sheffield Scientific School of Yale University.
NOTES. O n the Detcnniiintiotz of Flzroriiie.--\Vhen
fluorine i > determined t h e Berzelius' method t h e results vary and are considerably too low. Seven determinations gave j 6 to 94 per cent. fluorine a s calcium fluoride. 1 repeated the work of Seeman' but without being able to find Lvhere the loss occurred. Fusing the fluoride with sodium peroxide in a nickle crucible gave no better results. Fourteen' determinations, gave 81.1 to 94 per cent. of calcium fluoride tnkeii. I am led to believe that some of the fluorine is retained i n the fusioii residues as a complex fluoride", *I.A. I1INES. Hoiightoii , Mich .
The Rapid Dcfermtiiafion of W'afei- iu Buffer. A l u mipi 11 nz /lea kr r Method.-In t h e November (1506) Journal,' I described a method for t h e rapid determination of water in butter, of sufficient accuracy for factory purposes, which consisted merely in boiling the water off from a weighed portion of butter contained in a wide test-tube heated by t h e naked flame of a n alcohol lamp. Very shortly thereafter I made a seeniingly slight modification in t h e method, by adopting the use of a n aluminum beaker in place of t h e test-tube-a mere change in utensil, but a change which so greatly improves t h e method, both by faciliPogg. ann. I , 169; Schweigg. Jsb., 16, 4 2 6 ; and Treadnell: Kurges Lehrbach (1. Analyt. Chem., Bd. 11, nte, Auf., p. 326. 2. Anal. Chem., 44, 369 (1905). 2. -4nal. Chem., 33, j o 5 (1904) ; 2. Anorg. Chem., 51, 163 ( 1906). Thib Journal, v. 28, 1611.
