The paper describes an integral method of investigating the kinetics and mechanism of reactions based on the use of the degree of conversion measured at the same temperatures on curves recorded for a reaction carried out at various heating rates. The main advantage of this method is that it is not based on any assumption concerning the temperature integral, giving, thus, a higher degree of precision to the results. Since it is an integral method, the results are expected to be less affected by experimental errors. The method also allows the computation of the pre-exponential factor, A, and of the activation energy, E, if the Arrhenius-type relationship is assumed for the rate constant. The approach may be considered as a variant on the Ozawa-Flynn-Wall method. Theoretical considerations are verified on two sets of generated data from the literature, as well as on the experimental data acquired for the calcium oxalate dehydration reaction.