INTRODUCTORY. 31 



of each referred to^ aud ample information as to the mines given^ together 

 with numerous rough illustrations. 



It will be necessary to refer subsequently to various parts of these 

 l^apers^ whichj from the amount of information they contain, form certain- 

 ly the most valuable observations made upon the salt-bearing portion 

 of the Salt Range series. The advantage of having a competent mining 

 engineer aud analyst, acquainted with geological structure, resident 

 upon the spot, will doubtless be felt in connection with future opera- 

 tions. These appear likely to be carried out on a larger scale than 

 hitherto, a wire tramway from the Mayo Mines crossing the Jhelum 

 at Chak-Nizam having been erected (under the superintendence of 

 Lieutenant de Wolski, R.E.), and surveys on both sides of the river 

 having been made for a branch line from the Northern State Railway. 



In an able memoir upon the Indian Surveys* by Mr. C. R. 

 Markham, C.B., there is a passage at pag-e 105 



Markham, 1871. • -, r. ^ & A » 



upon the Physical Geography of the Upper 

 Punjab, in which the Salt Range is slightly mentioned. 



A very full collection of the Salt Range minerals and a complete 



set of petrological specimens illustrating the 

 Wynne and Wartli, 1873. 



structure of the range at Kheura, from the lowest 



salt upwards, was forwarded to the Vienna Universal Exhibition of 1873 

 by the Geological Survey of India. In making this collection Dr. 

 Warth rendered much valuable assistance, and furnished a solid rect- 

 angular mass of salt from within the mines, of about two tons in weight. 

 This large specimen was taken to shew the general character and strati- 

 fication of the salt, which it did very perfectly ; it arrived safely at 

 Vienna, via Lahore and Calcutta, and was left there. 



Dr. Oldham^ while he was officially engaged upon the arrangement 



of the East Indian mineral products at the Vienna 

 Oldham, 1873. 



Exhibition, noticed (in a communication published 



* Printed by order of H. M.'s Secretary of State for India in Council, Allan and Co., 

 London. 



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