CONTENTS. 



PART I. 



The Kolar Gold-field, being a description of 

 Quartz-Mining and Gold-Recovery as practised 

 in India, by F. H. Hatch, Ph.D., Assoc. M. Inst. 

 C.E., F.G.S., Mining Specialist^ Geological Survey of 

 India. 



Page 



introduction i 



CHAPTER I. 

 Geology. 



General geological description of the field. 

 The granite-gneisses ........ ,J . 



The Dharwar beds 5 



The Post-Dharwar dykes ......... 7 



CHAPTER II. 



The Lodes. 

 Structure and gold-contents 9—22 



CHAPTER III. 

 Mining Practice. 



Development and stoping 23 



Pumping 27 



Ventilation 28 



Illumination 28 



Development and mining costs . .28 



CHAPTER IV. 

 Surface Equipment. 



Power employed 32 



Steaming plant . . 33 



Prime motors 34 



Workshops 37 



Electric plant 38 



Headgears 39 



Transport arrangements 39 



Screening, ore-sorting and preliminary crushing * . . . ' . 40 



Water-supply and storage ......... 43 



