Author of "The Lund Hill Mode of Ventilation; " and "Practical Treatise on Gases, Explosions, Ventilation, and the Workings of Mines." St. Helens, March 14, 1864, The undermentioned persons have examined the Plans, &c., connected with the work, and have unanimously pronounced them to be of great practical utility, and the work to be one which has hitherto been much needed by Miners at large. ABEL HEYWOOD AND SON, 56 & 58, OLDHAM STREET. Any communications for the Author, addressed care of Mr. CHARLES THRUSH, 23, Russel Street, St. Helens, will be duly received. INDEX. Air, why it is propelled down, into, and around the workings Air, friction of................. Air, the great friction of, produced by one mode of ventilation, and how reduced by another Air, pure added to impure (plans) .. Air, splitting of (plans) Air, one current of (plans) 71 Air, one current of, and how to adopt separate currents (plan) Air, dividing of, but not into "separate and distinct" currents (plan)......... 36 Coal, several ways of working it out Coal, why many methods of working it out are adopted ...... Coal, working out in banks (plans) 36 95 65 Coal, working out by the "end way" or in endings (plan) ........ ..................... 32 Explosion, at Lund Hill, in what part of the mine it was supposed to take place (plan) Gases, the nature and quality of............ Gases, how generated in mines Gases, why some mines generate and produce more than others Gases, why some mines generate a mixture of ........... Goaf, or gob, how tramroads are made through (plan).............. ...... Managers, who are best competent to manage mines............ "Miscellaneous questions Regulations (see R on plans) 41 25 10 13 14 16 73 25 85 97 PREFACE. THE object which a writer should endeavour always to accomplish, is, to make use of such words, that every reader may properly understand him, and profit by reading his works. If the public, or that class of people for whom a work is written, cannot well understand the words written, they cannot profit by the reading, and the labour and time of the author is spent in vain. Therefore, to profit any class of people, in writing works for their better information, it is well if the writer have a knowledge of what such people are capable of understanding; for St. Paul says, 1st Corinthians, 14th chapter, 9th verse, "Except ye utter by the tongue words easy to be understood, how shall it be known what is spoken? for ye shall speak into the air." Also, 11th verse, "Therefore if I know not the meaning of the voice, I shall be unto him that speaketh a barbarian, and he that speaketh shall be a barbarian unto me." The words made use of may be proper and good, but are not profitable, if those for whom they are intended cannot understand the meaning of |