A model of the interaction of bones and environment has been worked out. With the help of the model the content of a number of elements in connection with the degree of contamination was tested. For analytical evaluation the following elements were chosen: calcium, strontium, sodium, potassium, lithium, cobalt, titanium, silver, zinc, copper, nickel, vanadium, chromium, lead, manganese. From the dependence thus found it follows that the aging of bones takes place very unevenly. From the proportional presence of some elements, however, one can determine the degree of contamination of each sample, either with soluble or with insoluble components of the environment, thus facilitating the interpretation of the results. -- AATA