216 



THE IRON ORE DISTRICT OF EAST TEXAS. 



TABLE OP ANALYSES OF IRON ORES OF SMITH COUNTY — continued. 



No. 



6 

 .2'R 



5 



a 



5 



6 ' 



a 

 3 



m 

 a 



M 



03 

 3 



Us 



o 



^a 



Oh 



0> 



"3 



o 



3 a 

 J o 



26*.... 



59.25 



16.55 



13.65 



.10 





.34 



.38 



10.55 



100.82 



41.86 



27*.... 



61.75 



16.80 



9r$5 



Trace. 



Trace. 



Trace. 



2.04 



9.50 



99.94 



43.62 



28*. .. 



42.10 



39.50 



8.70 



.12 



Trace. 



Trace. 



Trace. 



10.01 



100.43 



29.74 



29* 



51.46 

 38.19 

 57.25 



27.50 



43 80 



8.18 



9.74 







.24 



.27 



1.45 



1.47 

 .31 



9.48 



99.89 

 99.54 



36.34 



30f.... 



31* 







26.73 



30.63 



1.23 



.80 



40.08 



32* 



20.46 



68.68 



















14.32 



33 \ ... 



12 05 



6.12 



Trace. 



Trace. 



.17 



.18 



13.00 



100.20 



48.07 



34f.... 



56.00 



27.35 



5.70 



Trace. 



Trace. 



.32 



.35 



10.60 



100.32 



39.20 



35* 



32.48 



58.90 



2.32 



Trace. 



Trace. 



Trace. 



Trace. 



5.40 



99.10 



22.73 



36*.... 



50.20 



31.10 



7.80 



Trace. 



Trace. 



Trace. 



.54 



11.10 



100.74 



35.14 



3Tf 



65.96 



11.20 



8.83 



.70 



Trace. 



Trace. 



.62 



13.50 



100.81 



46.17 



38* 



57.85 



21.70 



8.45 



Trace. 



Trace. 



Trace. 



.86 



10.90 



99.76 



40.49 



39* 



64.36 



16.90 



7.44 



Trace. 



Trace. 





.48 



10.00 



100.18 



45.05 



40 f... . 



59.71 



22.25 



7.39 



Trace. 



Trace. Trace. 



.80 



10.00 



100.15 



41.79 



41 * 



67.14 



13.93 



4.06 



Trace. 



Trace. Trace. 



.44 



14.40 



99.97 



46.99 



42 + 



43 j 



44 f 



58.89 

 63.73 

 53.83 



21.20 

 14.80 

 30.90 



8.61 



14 67 



4.47 



Trace. 

 Trace. 

 Trace. 



Trace. 





.29 

 .38 

 .025 



11.10 



9.50 



10.40 



100.09 



100.08 



99.86 



41 .12 



Trace. 



44.61 



Trace. 



.24 



37.68 



Nos. 33 to 44 inclusive were collected by G. E. Ladd. 

 Analyses marked * by J. H. Herndon; f by L. E. Magnenat. 



LIGNITES. 



I have been asked so many questions while working up this subject about 

 the origin and value of lignites, that 1 deem a short explanation of their ori- 

 gin would not be out of place at this time, when so little is known in regard 

 to lignites in Eastern Texas. 



When vegetable matter undergoes decay with exclusion of air, under water 

 or in the earth, it undergoes certain chemical changes. These changes are 

 aided by pressure aird temperature. The vegetable matter or wood gives 

 off water, carbonic acid, and carburetted hydrogen, thus becoming richer in 

 carbon, and forming what is known as coal. Low swampy lands, lagoons, 

 estuaries, and sand bars at the mouths of rivers afford the requisite conditions 

 for the accumulation of vegetable matter. 



In regard to the formation of coal, an eminent authority says: * 



"The most generally received opinion is that much if not all coal results 

 from the transformation of plants upon the site of their growth. The prin- 

 cipal evidence in favor of such a supposition is afforded by the common oc- 

 currence of a bed of clay, the so-called 'under clay,' containing the roots of 

 plants, representing the old soil, immediately below every coal seam — a fact 

 that was first pointed out by the late Sir W. E. Logan in South Wales. 

 * * * The action of the water in bringing down drift wood may also 

 have contributed some material, but much less than the local growth. * * * 



: Encyclopaedia Britanica, vol. 4, page 47048. 



