¥ > = \, Eire : te. ere ee Pe 
f é , . ; 1 ih i Oe \ a 4 
S “Ay. “es “7. 
ie a SS f “een ee fy 
174 -  —‘ [Assempry, No. 33.]_ 
Per cent H glucose in mie, juice. 
Ee on takiens ow oe brava aay) Uebgsvateue Naty We’ ai'eat we ORME 3.22 3.18 
Pera let pyar eceke ous eb eldae a tole aiaeie ake eels: wists oe aac 3.84 3.85 
Roe sutt sy nal. oe a Maiee Datich gd ie aattur'e! Altes abe che rehnmmeste Ie 3.69 8.66 
7h Cag ORME Se ae Ceara Mo 338 os “hints Sa RR 3.99. 3.97 
TSAR A DAI oa” URINE Uta Re tee aie eK 3.72 3.74 
PN a ates cD SEEMS Delt op te cee Gs hve MG oP RE OE Ts 3.24 3.27% 
Only two determinations of cane sugar were made by the chemical 
method this year, these together with the polariscope test are given 
below : . 
Cane Sugar. 
. By Polariscope. Chemical Method. 
Ls ROA AE RAR i Me Cnt opi MAE ARATE UUs re AL 1G Ea. 11.30 
a [ae A CO ee Re Rar g ik Se EDA Py oy, 11.62 11.56 
IV. ANALYSIS OF FERTITIZERS. 
The determination of phosphoric acid has, in all cases, been made 
by Pemberton’s volumetric method, with ammonium molybdate, as 
modified by Prof. Caldwell in the second report of the Cornell univer- 
sity experiment station. Soluble phosphoric acid has been separated 
by digesting, with frequent shaking, 10 grams of substance in 500 c.c. 
of water and titrating 50 c. c., equal to 1 gram. Reverted phosphoric 
acid is separated by ammonium citrate precipitating directly with mag- 
nesia mixture, according to Peterman’s method, as directed by Prof. 
Johnson in the Connecticut experiment station report, but instead of 
igniting and weighing this precipitate as recommended by him, it 
has been dissolved in nitric acid and titrated with ammonium molybdate. 
This not only saves time but avoids the possible error arising from the 
precipitation of lime with the phosphoric acid. 
Nitrogen and potash have been determined in the usual manner. 

