Light scattering experiments reveal a strong suppression of phase separation near the critical point of a vigorously stirred binary liquid mixture. For stirring Reynolds numbers R ranging from 6.0 × 103 to 4.5 × 103, the apparent critical temperature is depressed by ∼1 mK to ∼50 mK. This temperature depression ΔTc can be fitted to a power law ΔTc∼Rλ where λ∼2. The magnitude of ΔTc is consistent with simple models which attribute the effect to the suppression of composition fluctuations by shear; however, these models predict λ≃0.80 in contrast to the observed value of ∼2. Below the apparent critical temperature the turbidity τ changes significantly throughout a temperature range of tens of millikelvin following a power law τ∝(Tc−T)ζ where ζ increases from ∼1 to ∼6 as R is increased
