Samples of 15 rocks with porosity ranging from nearly zero to 40 percent were deformed in uniaxial strain to stresses which reached 31 kb. The principal stress ratio and the volumetric strain were recorded for comparison with experiments done statically elsewhere and with results from shock loading. The stress-strain relations of low porosity rocks such as Westerly granite are nearly identical with those reported for shock loading. For material with porosity greater than about 2 percent, permanent compaction occurred at the stresses imposed here. Compaction was apparently time-dependent, for nearly twice as much compaction was observed in our static experiments as in shock loading. Macroscopic faulting was not observed. For rocks of low porosity the stress-strain relation in uniaxial strain loading is closely predictable from compressibility, suggesting that behavior of these rocks was elastic, or, at least, recoverable even to high stress levels.