Pt. III.] 



SUMMARY. 



189 



On a close examination the brighter streaks are seen to have a 



lenticular section. Where thickest, they seldom exceed an inch, and 



they thin out towards both ends. They appear to be flattened masses 



of irregular shape, in a matrix of a dull black color. This has not 



been separately assayed, but the whole mass of the coal, in two 



good samples from Raniganj and Sirsol mines, gave the following 



results, viz. : — 



Sirsol. Raniganj. 



Volatile ... ... ... ... 38-5 



Fixed Carbon 



Ash 



51-1 

 10-4 



36-5 

 52-5 

 11- 



And the results of a series of assays of various coals on the Raniganj 

 field shows that the above is a fair representation of the composition of 

 the best class of coal obtainable from the mines.* 



field 



The following list gives the average composition of several of the principal coals in the 



Indian Coal, Damuda Field. 



Carhon. 



Volatile matter. 



Ash. 



Tuttipur 



63-80 



25-0 



11-20 



Hatinal 



61-0 



27'50 



11-50 



Raniganj 



60-50 



300 



9-50 



Chowkidangah 



56-50 



35-0 



8-50 



Jemeri 



5560 



340 



10-40 



Mainanagar, Dhadkia 



54-35 



35-52 



10-13 



Gopinathpur 



53-25 



3525 



11-50 



Tapassi 



5375 



3150 



14-75 



Sirsol 



51-1 



385 



10-4 



Rogonath Chuk 



50-50 



36-0 



13-50 



Jor Janki 



48-50 



30-50 



210 



Nimchah 



47-0 



31-50 



21-50 



Mangalpur 



4475 



370 



18-25 



Parasia 



44-0 



32 



24-0 



Kasta 



43-50 



32-80 



2370 



Harispiir 



41-20 



3720 



21-60 



Mahuldabar 



39-20 



25-60 



35-20 



With reference to the above table, it should be stated that probably no second analysis of 

 coals from the same localities would give exactly similar results. They depend much on the 

 sample submitted to examination. And, inasmuch as we could only deal with small quan- 

 tities, and were compelled to take these at the time of our visit to the mines, all we can assert 

 with reference to the above is, that it gives accurately the composition of fair average speci- 

 mens of the coals which were being raised for market at each colliery during the years 

 1859-60. The assays were made by Mr. G. E. Evans. — Thomas Oldham. 



