Safety in Coal Mines: A Textbook of Fundamental Principles for Firemen and Other Workers in Mines |
Common terms and phrases
acid air contains air current air passing airway aluminium carbide anemometer animal apparatus atmosphere atomic weight barometer becomes black damp blood Boyle's law breathing burn candidate carbon dioxide carbon monoxide causes cent certificate chamber CHARLES'S LAW chemical CO₂ coal gas colliery colour combined compound cork cross section dangerous delivery tube dilute Education Committee elements examiner or deputy explosive mixture extinguished feet per minute filled firedamp fireman flame flask formed gas and air gases gauze give glass H₂ H₂O hæmoglobin Haldane heat hydrochloric acid hydrogen ignition inflammable gas light lime water means methane method miner Mines Act mixed nitrogen observed obtained ordinary oxide oxygen particles potassium chlorate presence pressure produced rate of diffusion readily reading relative weights safety lamp sample bottles saturated side small quantities smell solution substances sulphur sulphuretted hydrogen Symbol taken takes place taper temperature tion vapour velocity water gauge
Popular passages
Page 14 - Smallest particle of matter that can take part in a chemical reaction.
Page 15 - This hypothesis states that equal volumes of different gases at the same pressure and temperature contain the same number of molecules.
Page 157 - THE COAL-FIELDS OF SCOTLAND By ROBERT W. DRON, AMICE, MIME Certificated Colliery Manager Demy 8vo, cloth, 15^. net A topographical and geological description of the mining areas of Scotland, with details of the various seams and many maps of the coalfields.
Page 153 - ... and that his hearing is such as to enable him to carry out his duties efficiently, the...
Page 157 - AN ELEMENTARY TEXT-BOOK OF COAL MINING. A Class-Book for Elementary Students Preparing for the Science and Art Examination in " Principles of Mining " and for Colliery Managers
Page 145 - ... connected with that seam. 33. Wherever safety lamps are required by this Act or the regulations of the mine to be used, no safety lamp shall, after the first day of January nineteen hundred and thirteen be used by any person employed in the mine, unless it is provided by the owner of the mine, and is of a type for the time being approved, as respects the class of mines to which the mine belongs, by the Secretary of State.
Page 17 - The pressure of a given mass of gas at constant temperature is inversely proportional to its volume.
Page 51 - ... diluted specimen of blood. Procedure for Air Analysis. — Use any type of narrow-mouth bottle having a capacity of 200 to 300 ml. for taking the samples. These can be filled by aspirating the gas to be tested into the bottle by use of a hand rubber aspirating bulb. Squeeze the bulb at least 50 times to make sure that the original air in the bottle has been completely removed, so that the bottle contains a proper sample 7 of the gas to be tested.
Page 26 - With air or oxygen, hydrogen forms a highly explosive mixture, especially in the proportion of two volumes of hydrogen to one volume of oxygen.
Page 15 - The molecular weight of a substance is equal to the sum of the atomic weights of the elements constituting the molecule.