374 THE COLLIERY GUARDIAN. February 25, 1916. be, probably, more difficult of solution than the cele- brated “ battle of the gauges ” in the case of railways. Mr. John Watson (Kilmarnock) wrote remarking that the importance of standardising the methods of manu- facturing all kinds of material required in large quan- tities was too well known to be enlarged upon. It appeared advisable, also, to have standard names, as well as standard things, since confusion often resulted from the present differences in names for the same articles. Mr. Wm. Smith (Dunaskin) stated that, in a case which came under his notice, tubs holding 8 cwt. were gradually replaced by others carrying 10 cwt. The men continued to fill the same number of tubs, the output was thus raised 25 per cent., and wage disputes were considerably reduced. Managers who had been able to adopt underground conveyors had had the importance of the subject strongly impressed upon them. Tubs which formerly seemed adequate were found, with a conveyor at work, to be altogether inadequate, proving that, where hand drawing was reduced to a minimum, one of the principal factors against increasing the size of the tub was removed. As to the track, it was certainly an advantage to have the rails in exchangeable lengths, as 18 ft., 9 ft., and 4|ft., but he considered that the manager had already more than sufficient statutory responsibility to have to run the risk of a prosecution for a track over or under the gauge, as might happen under the amending Act suggested by Mr. Gibson. The President remarked that there was much in common between Mr. Dean’s paper and that of Mr. Gibson, and he suggested, that the discussion of the two papers should proceed simultaneously at the next meeting. This course was agreed to. Mr. Percy Widdas exhibited, described, and demonstrated a “ Widdas ” patent incline chock. A safety mine-cage arrester was exhibited, described and demonstrated by Mr. Thos. Pearson. LETTERS TO THE EDITORS. The Editors are not responsible either for the statements made, or the opinions expressed by correspondents. All communications must be authenticated by the name and address of the sender, whether for publication or not. No notice can be taken of anonymous communications. As replies to questions. are only given by way of published answers to correspondents, and not by letter, stamped addressed envelopes are not required to be sent. INADEQUATE SUPPLIES OF FUEL. Sirs,—The present condition of the above arises chiefly from two causes, namely : (1) the diminution in output at the collierieig caused by the shortage of labour; and (2) the enormous amount of fuel of all kinds required for munition work for war purposes. We note that in view of the> difficulties experienced in certain areas in securing adequate supplies of coal, the Government are now about to appoint local committees (connected with collieries) for the purpose of obtaining these adequate supplies for their requirements. The output of coal cannot be materially increased at present, but the supply of quite satisfactory fuel can easily be enormously increased, provided that proper means are employed for the production of the same. . In connection with many collieries and gas works there are thousands of tons of small fine coal produced, and also of coke breeze, which in their ordinary condition are of comparatively little use or value, but which when properly treated in suitable up-to-date machinery, can be very,profitably converted into ovoid briquettes, which can successfully compete with best qualities of coal for boiler or domestic consumption. Many colliery and gas companies are