Abstract: The Busseys BET-type mixed adsorption equations have been applied to adsorption from mixed vapors of cyclohexane-ethanol, benzene-ethanol, and benzene-cyclohexane on Cab-O-Sil at 30℃, and to adsorption from oxygen-nitrogen and oxygen-argon on chromic oxide gel at - 185.6℃. The results are compared with experimental data, and also with authors and Hills BET-type mixed adsorption equations. Since Hills equation is much more complex than Busseys and authors equations, and its predictions are not much different from those of Busseys equation, it is not recommended for application. On the other hand, both the Bussey s and authors equations contain exclusively the parameters of BET equations for single vapors; therefore, they are easy to apply. For some systems the predictions of authors equation are better than those of Busseys equation, while for other systems the reverse is true. Therefore, from the present results, no conclusion can be reached about which is superior.