  The second flight of the Medium Scale Anisotropy Measurement (MSAM1-94)
observed the same field as the first flight (MSAM1-92) to confirm our earlier
measurement of cosmic microwave background radiation (CMBR) anisotropy. This
instrument chops a 30\arcmin\ beam in a 3 position pattern with a throw of
$\pm40\arcmin$, and simultaneously measures single and double differenced sky
signals. We observe in four spectral channels centered at 5.6, 9.0, 16.5, and
22.5~\icm, providing sensitivity to the peak of the CMBR and to thermal
emission from interstellar dust. The dust component correlates well with the
\IRAS\ 100~\micron\ map. The CMBR observations in our double difference channel
correlate well with the earlier observations, but the single difference channel
shows some discrepancies. We obtain a detection of fluctuations in the MSAM1-94
dataset that match CMBR in our spectral bands of $\Delta T/T =
1.9^{+1.3}_{-0.7}\times 10^{-5}$ (90\% confidence interval, including
calibration uncertainty) for total rms Gaussian fluctuations with correlation
angle 0\fdg3, using the double difference demodulation.
