[en] Magnetic spin-lattice T₁ and spin-spin T₂ proton relaxation times are measured vs. the water content (from 20 to 80 precent) of muscle tissue and amelanotic melanoma B16 tumor tissue. The results permit the checking of data from literature and show the relation between the spin-lattice relaxation rate and the water content of the tissue to be considerably weaker than that reported. The increase in Tsub(1) and Tsub(2) for tumors as compared with muscle tissue is defined too, but only by 22-23 percent due to the difference in water content of the two tissues. (author)