In analysing these products we have employed the Dumas method for _total nitrogen_. For the O.NO_{2} groups we have found the nitrometer and the Schloesing methods to give concordant results. For the NO_{2} groups it was thought that Limpricht's method, based upon reduction with stannous chloride in acid solution (HCl), would be available. The quantitative results, however, were only approximate, owing to the difficulty of confining the reduction to the NO_{2} groups of the nitrobenzoyl residue. By reduction with ammonium sulphide the O.NO_{2} groups were entirely removed as in the case of the cellulose nitrates; the NO_{2} was reduced to NH_{2} and there resulted a cellulose amidobenzoate, which was diazotised and combined with amines and phenols to form yellow and red colouring matters, the reacting residue remaining more or less firmly combined with the cellulose. _Cellulose dinitrate-dinitrobenzoate, and cellulose trinitrate-dinitrobenzoate._--On treating the fibrous benzoate--which is a dibenzoate on the C_{12} basis--with the acid mixture under the usual conditions, a yellowish product is obtained, with a yield of 140-142 p.ct. The nitrobenzoate is insoluble in ether alcohol, but is soluble in acetone, acetic acid, and nitrobenzene. In purifying the product the former solvent is used to remove any cellulose nitrates. To obtain the maximum combination with nitroxy-groups, the product was dissolved in concentrated nitric acid, and the solution poured into sulphuric acid. The following analytical results were obtained (a) for the product obtained directly from the fibrous benzoate and purified as indicated, (b) for the product from the further treatment of (a) as described: Found Calc. for (a) (b) Dinitrate Trinitrate dinitrobenzoate dinitrobenzoate Total Nitrogen 7.84 8.97 7.99 9.24 O.NO_{2} " 5.00 5.45 4.00 5.54 NO_{2} (Aromatic) 2.84 3.52 3.99 3.70 With the two benzoyl groups converted into nitro-benzoyl in each product, the limit of the ester reaction with the cellulose residue is reached at the third OH group. The nitrogen in the amidobenzoate resulting from the reduction with ammonium sulphide was 4.5 p.ct.--as against 5.0 p.ct. calculated. The moisture retained by the fibrous nitrate--nitrobenzoate--in the air-dry state was found to be 1.97 p.ct. The product from the structureless dibenzoate or tetrabenzoate on the C_{12} formula, was prepared and analysed with the following results: Calc. for Mononitrate tetranitrobenzoate Total Nitrogen 6.76 7.25 O.NO_{2} " 1.30 1.45 NO_{2} " (Aromatic) 5.46 5.80