  We have compared the Tenerife data with the {\it COBE} DMR two-year data in
the declination +40\deg region of the sky observed by the Tenerife experiment.
Using the Galactic plane signal at $\sim 30$ GHz, we show that the two data
sets are cross-calibrated to within 5%. The high Galactic latitude data were
investigated for the presence of common structures with the properties of
cosmic microwave background (CMB) fluctuations. The most prominent feature in
the Tenerife data ($\Delta T \sim 80\mu$K) is evident in both the 53 and 90 GHz
DMR maps and has the Planckian spectrum expected for CMB anisotropy. The
cross-correlation function of the Tenerife and DMR scans is indicative of
common structure and at zero lag has the value $C(0)^{1/2}=34^{+13}_{-15}\:
\mu$K. The combination of the spatial and spectral information from the two
data sets is consistent with the presence of cosmic microwave background
anisotropies common to both. The probability that noise could produce the
observed agreement is less than 5%.

Astrophysics