Excerpt from Electricity as Applied to Mining In a book of this nature, with its 'electrical' side and its 'mining' side, joint authorship is, if not absolutely

Excerpt from Electricity in Coal Mining Methods of Power Transmission - Importance of Electric Plant Adequate Power a Necessity - Mine Lighting - Importance of

Excerpt from Electricity in Mining Since those early days electricity has been introduced into mining work to an extent which was then undreamed oi, and to-day

Excerpt from Electrical Mining Installations This volume has been written especially for colliery engineers and contractors engaged in the installation of elect