The spontaneous magnetizationsM(T) of the ferromagnetic glasses (Fe40P14B6, Fe75P15C10and Fe80P16C3B1) have been measured by57Fe Mo¨ssbauer spectroscopy. At low temperatures, the change ofM(T) varies as B3/2(T/Tc)3/2, characteristic of ferromagnetic spin waves with an anomalously large value of B3/2. ForTclose toTc,M(T) varies as a power law with critical exponent &bgr; close to 1/3.