IOWA ACADEMY OP SCIENCES. 
73 
The plus reading- due to dextrose in sample No. II is therefore equal to 
34.6° 
The Sp. R. P. of dextrin is 200; by the above method we have the fol- 
lowing proportion: 
200:66.5 :: 26.048 :x 
x=8.66 (grams dextrin required to 100° sugar units). 
8.66:. 09 (table) ::100°:x 
x=1.04° (Plus reading on sugar scale). 
The Sp. R. P. of levulose is 98.8, the reading due to levulose would there- 
fore be as the proportion: 
98.8: 66.5:: 26.048 :x 
x=17.54 
17.54:8.58 (table) :: 100 : x 
x= — 48.91° (Minus reading on sugar scale). 
The rotary power of the sample is as follows: 
Sucrose-f- 3°. 74 
Dextrose+34°. 60 
Dextrin -f- 1°.04 
Levulose — 48°. 91 
Total, calculated — 9°. 53 
Observed — 9°. 9 
Difference 0°.37 sugar unit. 
This difference corresponds to .01 gram honey in the charge 
taken. 
I propose the following outline method for ordinary honey 
analysis : 
For determination of moisture use the paper coil (Josse) method. 
For sucrose, double polarization and Clerget’s formula. 
For levulose, range of temperature as proposed by Allen. 
For dextrose, gravimetric precipitation with slaked lime (Allen). 
For volatile material, plan as proposed in this paper 
For non-crystalizable material, any good diffusion apparatus — using 
flowing water. 
For Organic Matter not sugar, method as given by Wiechmann. 
For dextrin, separation by absolute alcohol. 
For ash, ignite at low redness until gray or white residue remains. 
For acid, titrate with fg alkali and figure the result as formic acid. 
Note— F or literature upon tbe subject of honey analysis see: 
Jour. Chem. Society, June 1894, p. 2G9. 
Jour. Chem. Society, 1873, 25, p. 90G. 
Jour. Chem. Society, 1878, 2, p. 969. 
Jour. Chem. Society, 48, p. 444. 
•Jour. Chem. Society, 1886, 50, p. 283. 
Analytical methods for honey, J. Sieben. Fres. Zeit. f. a. Chem., 1884, 34, 137. 
€hem. Cent. Blatt, 1893, II, p. 893. 
Zeit. ges. Brauw. 16, p. 349. 
Pharm. Jour. Trans., Nov. 1, 1884, p. 343. 
Analyst, 1878, 3, p. 267. 1884, 9, p. 64. 1889, 14, p. 30. 
