A method of coring Quaternary deposits with percussion drillingmachines is described. The Swedish State Power Board and the Swedish Diamond Rock Drilling Co. (Craelius) have constructed and used equipments for sampling cores of soils. No detailed technical descriptions are given. With the equipment, shown in figs 1–3, it is possible to take almost complete cores in all kinds of soil, except for those with especially high boulder and stone contents, for example glacial till with high boulder frequency and extremely coarse glacifluvial deposits. It is an important advance, that representative cores of tills with low or medium boulder frequency can now be obtained. Well over half of Swedens' total area is covered by such types of till.