144 NATURAL RESOURCES SURVEY 



which will yield one gallon per cubic foot or five thousand 

 barrels per acre in five foot sands. The average under such 

 conditions may not be over 800 barrels per acre. Excessive 

 use or the drilling of other wells are generally causes for the 

 usual decrease in the flow of wells. 



In an analysis of the oil of the first well made by Professor 

 Clark of the University, the data is as follows: 

 Temperature of distillate. % of product. Nature of 



product. 



Below 150 degrees. C 4.5 ) AT ,, 



From 150-200 " 5.5 [ Na P tha - 



" 200-250 " " 11.75 i T11 . ,. 



" 250-300 " " 14.001 Hummatmg oil 



Above 300 " '" 53.00^ Lubricating oil of 



excellent character 



Residuum and coke. 11.25 



Professor Clark further states that the sample furnished 

 by Mr. Edmund Ross, from which this analysis was made, 

 upon standing for ten days, divided into three clearly marked 

 portions as follows: 



Top layer of crude petroleum .87 Sp. Gr. 



Middle layer of crude petroleum and some fine sand and 

 clay .979 Sp. Gr. 



Bottom layer water. 



A portion of the middle layer was diluted with- ether and 

 when whirled in a centrifuge a considerable amount of water 

 and fine clay sediment separated. The top layer of oil was 

 taken for distillation as it is probably typical of the whole 

 sample when freed from sediment. The Professor states 

 that the distillate, in his opinion, will run some higher in the 

 oil at the wells as the samples brought in are not tightly 

 corked. 



Another sample than that analysed, but from the lower 

 region was used in the determination of its specific gravity 

 by the mineralogy students who found it to be .993, or by 

 the Baume scale, 26.770. 2 The sp. gr. of other fields in this 

 country range from the heavy oils of West Virginia at .873 sp. 

 gr. to the Beaumont, Texas oils of .920 sp. gr. Several au- 

 thorities on oil besides several geologists have visited the 

 fields and all seem to agree that the deep wells will test the 



(2) Ries "Economic Geology." 



