Bartlesville, Okl. March 24-1919, Had breakfast here and then visited the Empire Co's building to see Mr. Supers on drill in relation to the well record samples. Of nearly all the wells a record is kept, but their main use of value is geology, rather for other purposes. Mr. Trajer does the work in determining some minerals as mica, pyrite, feldspars, the lithology and chemistry of the logs. Has a laboratory within own. In another lab, all the waters are analyzed and there is a great variety, and at the same time a constant hot in relation to the atmospheric springs. The recording system in McCups department is elaborate and of thousands of orders. At 2.30 P.M. started out on a large auto to the D.E. to geology about Brushcreek. In the party are McCoy, Supers, Byers and Trajer, a daffy young lot of geologists. From Bartlesville we went via Ramona to Peru, Collinsville to Claremore where we put up for the night at the Mason Hotel. We started down in the Pennsylvanian section: beginning (length 10') (length 10') with the Derry Ln. and then the Hargroth. The former (about 10') in a thick persistent horizon. Then came the Lenapah, a widely persistent zone. followed by the "Big Lime" of the drillers or the Oologah. The latter made a peak cliff down which we descended to the First Fort Ln. the last one seen this afternoon. In the Oologah we saw some Composita, Martini, sixteen Comphryllum or Lophophyllum and crinoidal M.