65 



the north they are higher stratigraphically, and also shallower 

 in depth. The Westfield pool is in the upper coal-measures. 

 Most of the oil in Crawford county seems to come from the 

 lower coal-measures, well down toward the base. In Lawrence 

 county there are three sands, the main production being from 

 the Buchanan sand at 1,300 ft. This probably represents the 

 Mansfield sandstone of the Indiana geologists, an approximate 

 equivalent of the Pottsville strata of the East. The Kirkwood 

 sand at 1,600 feet is in the Chester. Farther south in the Prince- 

 ton, Indiana, the Chester group is also productive. 



In general the year's work resulted in extending the field to 

 the south and in connecting up intervening territory. Wild- 

 catting was active in other parts of the state, but so far without 

 much result. Some gas has been found near Medora, and one 

 or two oil wells have been brought in at Sparta, but as yet too 

 little has been done to test thoroughly any considerable portion 

 of the field. 



ILLINOIS TREES. 



T. J, BURRILI,, 



Illinois was originally a prairie country, but there were also 

 large bodies of woodland. The northern and southern quarters 

 were better wooded than was the central half of the area, tho 

 the latter had many groves and belts of timber. The trees were 

 of numerous species and often were finely developed specimens. 

 The largest were on the rich lands bordering the streams, nota- 

 bly upoii the "bottoms" of the Mississippi, Ohio and Wabash 

 rivers. 



