eT Sta: Bes, 4 f oreo Wi te 
L a) v 4 
No. 33.] 168 
ing the coming year, a presentation of the results is deferred until a 
succeeding annual report. 
Examinations have also been made of several samples of drinking 
water for private parties. — ; 
| ASH ANALYSIS. 
T'wo complete analyses of ash from the leaves of tobacco have been 
- made. No. 1 is from tobacco that had been fertilized with air-slaked 
lime. No. 2 from tobacco fertilized with sulphate of iron. 
A careful analysis of ash from samples of thirty stalks of Wausha- 
kum corn, taken at different stages of development, is also given. The 
ash analyzed was from the whole plant. 
Tobacco, Tobacco, Corn. 
No. 1. No. 2. 
MMOLE es Ue 0% 010 oS aie, ae, e!o\'s «bible 20.27 21.87 81 
Pree y Oe ee ios aac ta ee ee 26 415 24.76 34.36 
oo Eh 0 ROSS RE ee gn al RUN 151 75 .50 
Magnesia My O..........:. SP ldeta Sevekete © 5.20 5.15 11.64 
Beas ls e's Visas 6) halk wa oe soo as 28 .26 28.23 10.76 
Rea EON Hh Oy. Og fog dc s'se«, tyson ee to 2 '6 150 a 4 1.28 
Phosphoric anhydride P, O;...... ..... 2.38 2.68 ier & 
Sulphuric anhydride § O; .-........... «B44 5.48 2.60 
LET te SRG ACS es a A .66 74 2.93 
Bee Oa. sss ian. s alegre y , ava aeee ee Rie 8.07 9.92) es 1 De oo 
MMDOATOXICO C05 ae Ok ba eed Saas 20.83 20.84 5 t6: 
Minconsumed carbon . 2)... oe. le eck : .38 “41 
ANALYTICAL METHODS. 
Although the methods of analysis adopted have been similar to 
those in general use by agricultural chemists, several modifications in 
the details of the work have been introduced which have greatly 
facilitated it. The following description of the methods and ap- . 
paratus used is therefore given to enable others, who may wish, to test 
their value. 
I. FopDER ANALYSIS. 
1. The sample and water determination. 
For dry fodder, like hay, straw, cornstalks, etc, a quantity suffi- 
cient for a fair sample is cut with a fodder cutter, the cut portion 
thoroughly mixed and two or three pounds taken for the water deter- 
mination. The sample is divided in two or more portions, placed in 
tared dishes, weighed on a balance sensitive to 0.1 gram, and dried 
at 100° C. till the weight is practically constant. The loss gives the 
water. 
Green plants are dried directly at 100° C. as above, after being cut 
in suitable pieces with shears. 
_ Prolonged drying at 100° C. is not desirable, for while it does not ~ 
materially affect the quantity of water found, in some substances it 
induces a change in the fats, probably an oxidation, which makes _ 
them insoluble in ether. This is shown in the following determina- 
tions of fat in corn meal. The meal was first dried about thirty 
hours when it was found to be dry. The fat was determined in a por. 
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