346 REPORT—1896. 
proportion of the oxidised product soluble in acetone, as the following 
details of an experiment with 10 grams of finely ground coal show. 
Ten grams of brown coal boiled for 12 hours with dilute hydrochloric 
acid and 20 grams of potassium chlorate ; the insoluble mass was filtered 
off, washed, and dried. The dried solid weighed 6°82 grams: of this 72°4 
per cent. was soluble in acetone. The portion insoluble in acetone, viz., 
1°88 gram, was treated for 12 hours more with hydrochloric acid and 
potassium chlorate, giving a solid product of 1:49 gram, of which 79-8 
per cent. was dissolved by acetone. The chlorinated compounds formed 
in this manner are very similar in appearance to those obtained from the 
Hutton seam coal, and probably of a similar character. The crude solid 
left after the evaporation of the acetone was found to contain some 22°93 
per cent. of chlorine. 
The investigation of these substances as also the products formed by 
the oxidation of brown coal with solutions of potassium permanganate 
are still in progress. 
Bibliography. 
Baltzer . 4 . ‘Vierteljahrsschr. d, Ziir. Naturf.-Gesellsch., 1872. 
F. Muck . . . ‘Die Chemie der Steinkohle.’ Published by W. Engelmann, 
Leipzig. 
E. von Meyer . . Gases enclosed in Coals. ‘Journal f. prakt. Chemie’ [2], v. 
144-183, 407-427 ; vi. 389-416. 
J. W. Thomas . . Gases enclosed in Coals. ‘Journal of the Chemical Society.’ 
:, E . The Gases enclosed in Cannel Coals and Jet. ‘Journal of the 
Chemical Society,’ August 1876. 
Fe - . The Gases enclosed in Lignite and Mineral Resin from Bovey 
Heathfield, Devonshire. * Journal of the Chemical Society,’ 
August 1877. 
(These papers are also reprinted in ‘Coal, Mine Gases, and 
Ventilation.’ Bythesame Author. Published by Longmans.) 
Schondorfft : . v. Preuss. Schlagwetter-Commission. 
Bedson . 4 . Contribution to our Knowledge of Coal Dust. ‘ Proceedings 
of North of England Institute of Mining and Mechanical 
Engineers,’ vol. xxxvii. p. 245; also ‘Transactions of the 
Federated Institution of Mining Engineers.’ 
Bedson & McConnell ‘Transactions of the Federated Institution of Mining 
Engineers.’ 
J. F. W. Johnston . Middletonite. ‘ Phil. Mag.,’ vol. xii. 1838, p. 261. 
J. W. Mallet . . Scleretinite. ‘ Phil. Mag.’ [4], vol. iv. 1852, pp. 4, 261. 
Johnston . : . Guyaquillite. ‘ Phil. Mag.,’ vol. xili. 1838, p. 329. 
5 s : . Berengelite. ‘Phil. Mag.,’ vol. xiii. 1838, p. 329. 
y : 3 . Ozocerite iv. Dana. ‘A System of Mineralogy.’ 
Dondorff . ‘ . v. Muck. ‘Die Chemie der Steinkohle,’ 3rd ed., p. 68. 
P. Siepmann . . ‘Preuss. Zeitschr. f. Bergwesen,’ 39, 8. 27, 1891. 
H. Reinsch , . ‘Journal f. prakt. Chem.,’ 1880 [2], 22, 188-191. 
P. Reinsch dl . ‘Dingl. polyt. Journ.,’ 256, pp. 224-226. 
EB. Guignet ; . ‘Compt. Rend.,’ 88, 590-592. 
Cross & Bevan . . ‘Cellulose.’ Pamphlet published for the authors by G. 
Kenning, 16 Gt. Queen Street, Lincoln’s Inn Fields, W.O. 
” . . Chemistry of Lignification. ‘Chem. Soc. Journ., vol. xiii. 
pp. 18-27. 
x : . The Chemistry of Bast Fibres. ‘Chem. Soc. Journ.,’ vol. xli. 
pp. 90-110. 
Schinnerer & Production of Pyrocatechol from Brown Coal. ‘ Ber.,’ vol. iv. 
Morawsky p. 185. 
R. J. Friswell . . ‘Proceedings of Chemical Society’ (London), 1891-92, p. 9. 
Watson Smith . . ‘Journal of the Society of Chemical Industry, 1891, p. 975. 
