  We demonstrate launching of laser-cooled Yb atoms in a continuous atomic
beam. The continuous cold beam has significant advantages over the more-common
pulsed fountain, which was also demonstrated by us recently. The cold beam is
formed in the following steps---(i) Atoms from a thermal beam are first Zeeman
slowed to a small final velocity, (ii) the slowed atoms are captured in a
two-dimensional magneto-optic trap (2D-MOT), and (iii) atoms are launched {\em
continuously} in the vertical direction using two sets of moving-molasses
beams, inclined at $\pm 15^\circ$ to the vertical. The cooling transition used
is the strongly-allowed ${^1S}_0 \rightarrow {^1P}_1$ transition at 399 nm. We
capture about $7 \times 10^6$ atoms in the 2D-MOT, and then launch them with a
vertical velocity of 13 m/s at a longitudinal temperature of 125(6) mK.
