A Conversation on Mines, Etc. Between a Father and Son: To which are Added Questions and Answers to Assist Candidates to Obtain Certificates for the Management of Collieries - A Lecture on the Atmosphere, Its Changes and Explosive Gases. - Tables of Calculations, Rules of Measurements, Etc |
Other editions - View all
Conversation on Mines, Etc: Between a Father and Son; To Which Are Added ... William Hopton No preview available - 2017 |
Common terms and phrases
ABEL HEYWOOD acid gas adopted after-damp air passages air passing air-gates air-way anemometer atmospheric weight barometer better black-damp boiler breadth carbonic acid carbonic acid gas cause colliery cubic feet cubic foot current of air degrees density dial diameter diminished divided divisions down-cast engine explosive gas Father feet of air feet per minute figures fire-damp fixed flame friction furnace give group of miners Hetton Colliery Hopton hydrogen ignited inches of mercury increased iron knowledge lamp large current length Lund-hill managers measure mechanical ventilator mixture mode of ventilation multiply natural heat needle nitrogen oxygen person pound pressure produced propelling force protractor pump pure air quantity of air quantity of gas reduced road roof rope safety safety-lamp sexagesimal sight specific gravity square foot square inch steam strata Suppose surface surveying takes place temperature theodolite tram-gates understand up-cast shaft velocity wind yards