202 THE COLLIERY GUARDIAN. January 21, 1913. the vessel A, and at the other end with the atmosphere; C is a small quantity of some mobile fluid, such as paraffin oil, which serves as a plug or piston which can move along the bore of the tube B. D is a scale divided into any convenient number of spaces and numbered so that the movements of the plug C can be referred to the divisions of the scale D. E is an auxiliary tube communicating with that part of the tube B which is between the plug C and the vessel A, and also with the interior of the vessel A. The stopcock F when open permits air to pass to or from the interior of the vessel A as the barometric pressure rises or falls ; but when the cock F is closed an increase of the barometric pressure acts upon the plug C and pushes it towards A until the pressure in A is again equal to the barometric pressure. When the barometric pressure decreases the plug travels away from the vessel owing to the pressure of air within the vessel being greater than the barometric pressure. The stop cock is closed when the instrument is in operation, but is opened for the purpose of stopping the indications of the instrument, and for enabling the observer to bring the mobile plug to any desired position in the tube by tilting or otherwise. The distance the plug C will travel along the tube B in any given time is easily calculated from the diameter of the bore of the tube, the volume of air in the vessel A, and the change of barometric pressure in that time. If the cock F be open the plug C may be*caused to run to any desired part of the tube B by tilting the whole apparatus one way or the other. Figs. 3 and 4 show the preferred method of obtaining autographic records. O O is a drum which is rotated by clockwork. Bound the cylinder of the drum is wrapped a sheet of photo sensitive paper ; the drum is enclosed in the box P to keep off extraneous light. One side of the box is made of thin material such as a sheet of brass blackened, and in which a narrow slot Q is cut. The tube B is fixed close to and parallel with this slot Q, and a broad beam of light from any convenient source passes through the tube, then through the slot on to the sensitised paper. The plug C affects the intensity of the light arriving at the slot and the paper immediately beneath it, and this effect is recorded on the paper photographically as the drum revolves. The piston when paraffin is used forms a cylindrical lens, which condenses a portion of the beam on to the sensitive paper, so that the photographic action is sufficiently intense for a record to be impressed upon the surface, which record is developed and fixed by any of the processes well known to photographers. If the mobile piston is made opaque, then instead of acting as a condensing lens, it serves as a screen to cast a moving shadow on to the sensitive surface. Any mobile fluid which does not readily evaporate will serve for the plug of liquid, and this plug is maintained intact by its surface tension and capillary attraction. (Six claims.) GOVERNMENT PUBLICATIONS. *** Any of the following publications may be obtained on application to this office at the price named post free. Report on the German Law against Unfair Competition, 2|d. Seventh Report of the Rural Education Conference, 3|d. Labour Gazette, January, 21d. Industrial Directory, 1913 [Cd. 6546], Is. 6d. Foreign Trade: Returns for December, 1912, 6d. PUBLICATIONS RECEIVED. Railway Consignment Notes. By B. O. Bircham, B.A. London : Butterworth and Co. Price 3s. 6d. net. Investors’ Book-keeping. By E. Carr. London : Effing- ham Wilson. Price Is. net. Taschen Notzbuch, 1913. Beilage su Deutsche Kohlen- Zeitung. Berlin: Verlag von Hugo Pfamer. Aluminium : Facts and Figures. London: British Aluminium Company Limited. The Gas Engineer’s Annual, 1913. By C. W. Hastings. London: J. G. Hammond and Co. Limited. ‘'Transactions of the North-East Coast Institution of Engineers and Shipbuilders” (Vol. 29, Part 3), price 5s.; “ Mathieson’s Highest and Lowest Prices, 1913 Issue ” price 2s. 6d.; “ Cassier’s Magazine” (Vol. 43, No. 1), January, price Is.; “ Two Great Tariff Trials of 1912,” by W. E. Dowding, issued by the National Press Agency Limited, London, price 3d.; “The Free Trader,” January 16, price Id.; “ The A.B.C. Fiscal Handbook,” published by the Free Trade Union, London, price Is.; “ The Machine Mining Monthly ” (No. 9), January, issued by the Diamond Coal Cutter Company, Wakefield; “Manufactures in Philadelphia, 1682-1912,” by J. G. Macfarlane (Philadelphia Commercial Museum) ; “Quarterly of the Colorado School of Mines” (Vol. 7, No. 4) ; “ Proceedings of the South Wales Institute of Engineers” (Vol. 28, No. 5), price 5s.; “ Charter, By-laws and List of Members of the South Wales Institute of Engineers,” corrected to December 1912, price 5s. Boring operations are about to be commenced in the vicinity of Culcheth, in South Lancashire, a few miles from Wanington. NEW PATENTS CONNECTED WITH THE COAL AND IRON TRADES. Applications for Patents. 918. Compressed air ejectors. S. H. Adams. 951. Centrifugal pumps. R. H. Dixon. 953. Turbine compressor and like installations. Hon. Sir C. A. Parsons, S. S. Cook and A. Q. Carnegie. 955. Pumping apparatus. L. H. Wattles. 961. Fans. P. Linke. 964. Mills for reduction of ore and other materials. E. Truelson. 973. Device for use with drill steels. H. C. Jenkins and J. Littlewood. 993. Apparatus for loading or trimming coal, grain, salt and other materials in bulk into ships’ holds and other storage spaces. A. Thorneley, E. W. Thorneley and J. R. Williams. 1000. Air-compressors. G. W. Stallard. 1001. Safety suspending grip for cages. P. H. Morris, G. B. Hulme and J, Bufton. 1006. Fuel and arrangements therefor. G. J. Epstein. 1021. Gas producers or the like. H. S. Knight and R. and J. Dempster Limited. 1028. Scraper for cleaning the external surface of fuel economiser tubes and the like. O. Moverley. 1089. Apparatus for removing soot and carbonaceous products from water-heating tubes. O. Imray. 1092. Manufacture of manganese bronze, or manganese brass, and similar alloys. F. Heusler and British Mining and Metal Company Limited. 1117. Gas-producers. C. Whitfield. 1118. Gas washers or tar extractors. C. Whitfield. 1121. Open-hearth suction - gas producers. Sir K. I. Crossley and F. Fielden. 1144 Water softening or purifying, or both water softening and purifying plants. H. Good. 1150. Additions to overhead travelling cranes. Steel Nut and Joseph Hampton Limited, and M. M. Merrell. 1152 Recovery of copper from its ores and solutions. H. L. Sulman, H. F. K. Picard, and Minerals Separation Limited. 1166. Ingot casting and compressing machines. L. E. Howard. 1168. Method of mounting sheet-metal washers on a core or pipe. Rheinische Schweisswerke Sieglar G.m.b.H. 1169. Device for utilising the waste heat of the Cowper apparatus in blast furnaces. J. Pregardien. 1181. Treatment of tin ores. J. W. Chenall. 1182. Centrifugal air-compressors. British Thomson- Houston Company Limited. 1183. Respiratory apparatus. G. Barault. 1185. Brakes for railway wagons and the like. T. Smith, G. T. Edwards, and O. B. Steward. 1187. Fluid-pressure turbines. G. Westinghouse. 1188. Fluid-pressure turbines. G. Westinghouse. 1189. Windings of dynamo-electric machinery. Siemens Brothers Dynamo Works Limited. 1190. Centrifugal liquid pumps. F. K. Woodroffe and H. C. Hodgson. 1207. Systems of voltage regulation for electric circuits. A. H. Olmsted. 1270. Steam generators. T. Clarkson. 1304. Working blastfurnaces. T. Rouse and J.‘ E. Torbock. 1306. Manufacture of steel. Viscount Chetwynd. 1309 Portable gas-generating and utilising plant, com- prising a producer of poor quality gas and a motor making use of this gas. Soc. Anon. Hongroise de Banke et de Commerce. 1326. Apparatus for delivering molten metal. G. Mellen. 1330. Gas-reversing valve with regenerative furnaces. W. Reitmeister. 1346. Pumps. J. B. Floyd. 1348. Automatic inclined producer for the manufacture of coal gas, tar liquor and smokeless fuel. W. B. Featherstone. 1355. Winding and haulage drums and the like. C. Davenport. 1384. Purification of coal and other gas. Manchester Paint and Varnish Company Limited and T. W. Jordan. 1386. Preventer of black smoke or smoke washer in factory chimneys, locomotive engines, tubular boilers, torpedo boats, cruisers and the like. W. Stokeld and H. Croft. 1399. Process for improving light and heavy hydrocarbons for fuel purposes. J. Moeller. 1406. Briquetting apparatus for peat blocks. W. L. St. J. Prioleau and J. R. H. Prioleau. 1515. Furnaces and fuel-feeding devices therefor. C. J. Greenstreet. Complete Specifications Accepted. To be published on February 6. 1911. 22452. Machinery for separating materials of different specific gravity. Ogle and Mineral Concentrators Limited. 25320. Arrangements for promoting circulation in steam boilers. Circulators Limited, Ross and Schofield. 1912. 892. Sinking of pits and shafts. Walker. 911. Controlling mechanisms for preventing overwinding or running at excessive speeds in winding gears. Black and Thornewill. 921. Machinery for the purpose of welding, rolling, bevelling, and finishing strips of metal. Field. 1185. Tin and terne plate machines. Lewis and Lewis. 1232. Gas-producers. Lymn and Rambusch. 1381. Rotary fans, blowers, and the like. Bretherick. 1461. Hammer rock-drills and percussive hammers and similar tools. Daw and Daw. 1610. Apparatus for pumping corrosive and other liquids. Lennox. 2489. Furnace grates for steam generators. Neil and Rutherford. 2709. Metallurgical furnaces. Cornthwaite. 3858. Refuse destructor or other furnaces. Hughes, Thwaites, and Craven. 4445. Furnaces for steam generators. Anderson, Meikle, and Fulton. 7460. Wire ropes. Bullivant and Selby. 7583. Props or supports for use in mines and similar places. Humble. 8203 Workmen’s time recorders and like apparatus. Krause. 9273. Apparatus for lubricating the bearings of long driving shafts in tube pumps. Neufeldt and Zurovec. 9953. Bronze alloy. Springorum. 11831. Apparatus for forming the shoulder ring and tapering butt end of jumpers or mining tools, wheel axles, and so forth. Rorive. 11904. Dry ore concentrators. Marks. 12675. Improved retort for the manufacture of coal gas. Hunt and Tipper. 14293. Automatic catches for retaining tubs in mine cages. Lewis and Griffiths. 14952. Reciprocating conveyors or screens. Norton. 17753. Divers’ helmets. Dragerwerk Heinr. and Bernh. Drager. 19421. Compressor or air pump. Burghard. 20977. Couplings for colliery trams or corves. Jones. 27041. Method of and means for loading and unloading coal. Hakendorf. 28364. Rotary pumps and similar rotary machines. Universal Rundlaufmaschine Ges. Complete Specifications open to Public Inspection before Acceptance. 1913. 475. Means for controlling steam blowers for locomotive boilers and the like. Langer. 476. Gas furnaces. Cousin. 732. Processes for the continuous reduction of zinc ores in vertical retorts. Roitzheim and Remy. CATALOGUES AND PRICE LISTS RECEIVED. Messrs. Wallach Brothers Limited, Royal London House, Finsbury-square, E.C., have placed before us a list which they have recently issued descriptive of their steam fittings. Messrs. Wm. Geipel and Co., Vulcan Works, St. Thomas- street, S.E., have sent us a pamphlet of their aluminium conductors for electrical purposes, copies of which may be had upon application as above. Messrs. Turbo Electrical'Company, 25, Victoria-street, S.W., have placed before us a copy of their new pamphlet relating to high-lift centrifugal pumps which are designed to pump against as high a head as 3,000 ft. or more. Mr. S. Lloyd Young, of the Gray’s Inn Modelling Studio, 28, Gray’s Inn-road, Holborn, W.C., has placed before us a booklet descriptive of models which he is prepared to execute for advertisers, engineers, inventors, &c., &c. We have received from the Power Plant Company Limited, of West Drayton, Middlesex, and Temple Bar House, Fleet-street, E.C., a copy of their new list No. 5, which contains a number of interesting photographs of their workshops and of their various specialities. We have received from Messrs. Galloways Limited, of Knott Mill Ironworks, Manchester, a four-page circular which contains a large number of illustrations of the leading specialities of this company, including boilers, large power gas and steam engines, pumping engines, hauling engines, &c. Messrs. Kynoch-Arklow Limited, Egypt House, 36, New Broad-street, E.C., inform us in a recent letter that they are acting as the agents for Messrs. Kynoch Limited, of Birmingham. Accompanying their letter is a booklet dealing with the subject of “ Electric Shot-firing,” and further copies may be had on application as above. Messrs. Siemens Brothers] Dynamo Works Limited, 38-39, Upper Thames-street, E.C., inform us that they have just placed on the market a new type of earthing clip, which is fully described in their price list No. 207.3, a copy of which we have before us. We have also received from Messrs. Siemens Brothers a price list descriptive of their electrical supplies for cinematograph theatres. Messrs. W. H. Palfreyman and Co., 17, Goree-piazzas, Liverpool, have sent us a leaflet descriptive of hydro- carbonated bone black for case hardening. Many advan- tages are claimed for this material over the ordinary raw bone for case hardening purposes. Messrs. Palfreyman and Co. have also compiled a pamphlet which contains an amount of data on the subject of case hardening and will be forwarded to all interested persons on application. Messrs. R. T. Lang Limited, advertising contractors, Tudor House, Tudor-street, E.C., have sent us a booklet descriptive of the “ Talbot ” cars, which are manufactured by Messrs. Clement Talbot Limited, Barlby-road, Lad broke- grove, W. In a letter accompanying the catalogue, our attention is drawn to a remarkable performance recently accomplished by a 25-horse power Talbot car, on which occasion it attained a speed of over 113 miles per hour on the Brooklands track. We have also received a copy of a preliminary catalogue which they have just published describing the Bayard cars. These cars are made in three four-cylinder types of 8, 10 and 14-horse power. The Fife Coal Company are paying particular attention to the housing of their employees. They have decided to pull down the old colliery houses on the north side of Broad-street, Cowdenbeath, and erect dwellings, each comprising a room, kitchen, bathroom, and scullery, on the ground floor, and a bedroom above. Garden plots will be placed in front of the houses.