_Composition._--Ash, 2.2 p.ct.; moisture in air-dry state, 12.3 p.ct. Alkaline hydrolysis (loss): (a) 14.77, (b) 17.84. Cellulose (yield), 52.33 p.ct. Nitrate-reaction complicated by secondary reactions and yields low, 90.95 p.ct. _Sulphocarbonate reaction:_ Resists the treatment, less than 10 p.ct. passes into solution. _Furfural._--The original tissue yields 7.13 p.ct.; the residue from alkaline hydrolysis (b) 5.40 p.ct. This tissue is, therefore, a lignocellulose having the chemical characteristics typical of the group, but of less resistance to hydrolytic actions. The investigation will be prosecuted in reference to the cause of differentiation in this latter respect. Probably the pectocelluloses are represented in the tissue. ~The Insoluble Carbohydrates of Wheat (grain).~ H. C. SHERMAN (J. Amer. Chem. Soc., 1897, 291). (p. 171) This is a study of the constituents of the cell-walls of wheat grain. Bran was taken as the most convenient form of the raw material, being freed from starch by treatment with malt extract, and further treated (1) with cold dilute ammonia, (2) cold dilute soda lye (2 p.ct. NaOH), and (3) boiling 0.1 p.ct. NaOH. The product retained only 1.25 p.ct. proteids, and yielded 15.62 p.ct. furfural. _Acid Hydrolysis._--The product was boiled 30 mins. with dilute acid (1.25 p.ct. H_{2}SO_{4}), and the solution boiled until the Fehling test showed no further increase of monoses. At the limit the reducing power of the dissolved carbohydrates was 91.3 p.ct., that of dextrose. Converted into osazones the analysis showed them to be _pure pentosazones_. The _hemicellulose_ of wheat is, therefore, according to the author, _pure pentosane_. _Residue._--This was a lignocellulose yielding 11.5 p.ct. furfural. It was subjected to a series of treatments with ferric ferricyanide, and the proportion of Prussian blue fixed was determined by increase of weight, viz. from 10 p.ct. to 47 p.ct. according to the conditions. The results confirmed those of Cross and Bevan first obtained with the typical lignocellulose (jute). _Chlorination._-The residue was boiled with dilute alkali, washed, and exposed to chlorine gas. The resulting lignone chloride was isolated by solution in alcohol, &c. It yielded 26.7 p.ct. Cl on analysis. In this and its properties it appeared to be identical with the product isolated by Cross and Bevan from jute, with the empirical formula C_{19}H_{18}Cl_{4}O_{9}. _Cellulose_ was isolated from the residue by three of the well-known methods, and the following comparative numbers are noteworthy: