Measurement of the integrated luminosities of the data taken by BESⅢ at <I>s</I>=3.650 and 3.773 GeV -

s=3.650 GeV during May 2009 and at √s=3.773 GeV from January 2010 to May 2011. By analyzing the large angle Bhabha scattering events, the integrated luminosities of the two data sets are measured to be (44.49±0.02±0.44) pb^-1 and (2916.94±0.18±29.17) pb^-1, respectively, where the first error is statistical and the second error is systematic."> Measurement of the integrated luminosities of the data taken by BESⅢ at <I>s</I>=3.650 and 3.773 GeV -

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