  Various independent ways of constraining the Hubble constant and the baryonic
content of the universe finally converged at a consensus range of values which
indicates that at the present epoch the bulk of the universe's baryons is in
the form of a warm $\sim$ 10$^6$ K gas - a temperature regime which renders
them difficult to detect. The discovery of EUV and soft X-ray excess emission
from clusters of galaxies was originally interpreted as the first direct
evidence for the large scale presence of such a warm component. We present
results from an EUVE Deep Survey (DS) observation of the rich cluster Abell
2199 in the Lex/B (69 - 190 eV) filter passband. The soft excess radial trend
(SERT), shown by a plot against cluster radius $r$ of the percentage EUV
emission $\eta$ observed above the level expected from the hot intracluster
medium (ICM), reveals that $\eta$ is a simple function of $r$ which decreases
monotonically towards $r = 0$; it smoothly turns negative at $r \sim$ 6 arcmin,
inwards of this radius the EUV is absorbed by cold matter with a line-of-sight
column density of $\geq$ 2.7 $\times$ 10$^{19}$ cm$^{-2}$. The area of
absorption is much larger than that of the cooling flow. These facts together
provide strong evidence for a centrally concentrated but cluster-wide
distribution of clumps of cold gas which co-exist with warm gas of similar
spatial properties. Further, the simultaneous modeling of EUV and X-ray data
requires a warm component even within the region of absorption. The phenomenon
demonstrates a three phase ICM, with the warm phase estimated to be $\sim$ 5-10
times more massive than the hot.
