Britton and Uresson.] 



360 



[Nov. 6, 1874. 



The coals swelled very littl3 duriag the coking. When powdered and 

 heated they agglutinated. The cokes resemble in appearance the kind 

 produced from the average bituminous coals of Western Pennsylvania. 



A portion of the sample from Carbon Mine was subjected for an hour 

 and a half to a temperature of 178° F., and lost in weight 5.72; subjected 

 for one hour more to a temperature of 280O F., the loss was increased to 

 7.31; and again for two hours more to the same temperature, the whole 

 loss was found to be 7.55. Another i)ortion of the same sample was then 

 subjected for three hours to a temperature of 500° F., and the loss was 

 9.55 The watery vapor was condensed in a cold glass tube, the tube was 

 carefully weighed and then the water was evaporated ; the tube when 

 cold was weighed again, and from the loss the weight of water was as- 

 certained . The coal w is then weighed, and its loss was found to corres- 

 pond very nearly with the weight of the water. A portion of the same 

 coal was immediately put into another tube and subjected for a moment to 

 a low red heat, when more water passed off and collected in the cold part 

 of the tube ; subjected for another moment to a little higher tempera- 

 ture, a dark brown oil passed off and condensed on the top, and ran 

 down the sides of the tube in the space between the coal and water. 

 The oil emitted a strong odor, the same as the oils produced by distilla- 

 tion from the bi'own friable lignites of Southern Arkansas and Texas. 

 The other three coals produced water and oil in like manner at a low 

 red heat. 



These coals are not lignites, and I believe that if dried at a temperature 

 of about 500° F., or a little above, will answer for puddling iron and the 

 purposes of the blacksmith, and that the cokes will answer for producing 

 pig iron in the blast furnace. J. BLODGET BRITTON, 



Iron Masters' Laboratory. 



They were examined for steam and illuminating gas purposes by Dr. 

 C. M. Cresson, The following is his report: 



Office and Laboratokt, ^ 



No. 417 Wcdnut Street, Philadelphia. ] 

 Coals marked "Carbon Mine," "Excelsior," "Mine No. 3" and 

 "Alury," have been examined as to their fitness for the production of 

 steam, and suitability for producing illuminating gas, Pittsburgh (Penn- 

 sylvania Gas Coal) being used as the standard of comparison. 

 The following results have been obtained: 



