Specimens of waterlogged wood Aesculus turbinata Blume) were treated with the following four methods: a) impregnation with PEG 4000; b) freeze-drying; c) alcohol-xylene-natural resin method; d) alcohol-xylene-acrylic resin method. Indentation hardness of untreated specimens (40-80) increased to 95 by a) and to 80-90 by other methods. Density (untreated 1.02-1.07) changed to 1.15 by a), and to 0.3-0.4 by other methods. The compressive strength parallel to grain of untreated specimens ranged from 3.4 to 32.4 kg/sq. cm. By method a) this strength was increased by 5-18 times, by 1.6-5 times by other methods, but the obtained strengths were much less than 400 kg/sq. cm of recent wood. Anti-shrink efficiency of treated specimens was more than 94% except the specimens treated with method d) which showed the efficiency of 91% in radial and 83% in tangential directions. See 18-1272. -- AATA