results lying between the requirements of the formulæ:
5 C6H10O5.H2O and 8 C6H10O5.H2O.
Hydrazones were obtained with 1.7-1.8 p.ct. N. Treated with caustic soda solution the hydrazones were dissolved in part: on reprecipitation a hydrazone of unaltered composition was obtained. The original product shows therefore a uniform distribution of the reactive CO- groups.
The hydralcellulose boiled with Fehling's solution reduced 1/12 of the amount required for an equal weight of glucose.
Digested with caustic soda solution it yielded 33 p.ct. of its weight of the soluble 'acid cellulose.' This product was purified and analysed with the following result: C 43.35 H 6.5. For the direct production of the 'acid' derivative, cellulose was boiled with successive quantities of 30 p.ct. NaOH until dissolved. It required eight treatments of one hour's duration. On adding sulphuric acid to the solutions the product was precipitated. Yield 40 p.ct. Analyses:
| C | 43.8 | 43.8 | 43.7 | |
| H | 6.2 | 6.2 | 6.3 |
The cellulose reprecipitated from solution in Schweizer's reagent gave similar analytical results:
| C | 43.9 | 43.8 | 44.0 | |
| H | 6.5 | 6.3 | 6.4 |
Conversion into nitrates.—The original cellulose, hydral- and acid cellulose were each treated with 10 times their weight of HNO3 of 1.48 sp.gr. and heated at 85° until the solution lost its initial viscosity.