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In using the BRUNTON POCKET TRANSIT , the observer sees simultaneously the compass and the object sighted . This is accomplished by a hinged mirror , which reflects the line of sight upward , toward observer .
A similar instrument , the Verschoyle “ pocket transit , " is preferred by some engineers . The transit is universally employed for accurate work . Any transit having a full vertical circle can be used for mining work involving no ...
fixed , the transit must be brought into line with them , by the shifting head . The micrometer head shown in Fig 26 is a help in this operation . All being set , measure the distances from wire to wire , from the nearest wire to the ...
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I only have the second volume of this work, and I love it! Found at a local Value Village, it is filled with fascinating information. Details of all aspects of mine engineering, including compressed air, ventilation, and supporting structures. Baca ulasan lengkap
Conditions Methods in General
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