We analyse the BOOMERANG and MAXIMA results in the context of models with $\Omega_{\rm Total} = 1$ and $n_s = 1$. We attempt to constrain three other parameters---$h$, $\Omega_B$, and $\Omega_m$---from these observations. We show that: (a) the value of $\O

Fig.1.—Thecontourscorrespondtoallowed1and2σregionsbyCMBRobservations(seetextfordetail).Thecross-hatchedregioncorrespondtothe95%region( 2σ)fromprimordialnucleosynthesis(Tytleretal.2000).