How to determine Sp gr of limestone other tests. How to make use of bogrod clay for drainage. How to recognize presence of bogrod clay. Core drills rather than churned drills for testing. Incorrect test at Tuckers reported 70 ft limestone, springs, important layers of clay, pits in clay residual for watering animals. struffy but which strata prove large areas of wedging rock, both wire there cores have been free fracturing instead of plication, strata may not have been as much subdivided than as m. an. Delman alla emaculata forve plicatio in glensidry. Gathering Cedar or gladesy logs, purple colr not found in Walden therefore a distrugizing feature of the bogrod. Southern grazing lopyx and maymillerus farms. D. J rocks useful in connectin with placing of wells and cesspools.