The Search for Extragalactic Lithium Hydride
  We have conducted Combined Array for Research in Millimeter-wave Astronomy
(CARMA) observations of LiH, in absorption, toward three quasars. These
quasars, B0218+357, PKS1830-211, and PKS0201+113, have redshifts of z = 0.685 -
3.387$, and shift the LiH J=1-0 transition to the 1 mm and 3mm wavelength
bands, where atmospheric absorption is sharply reduced from that predominating
near the rest frequency of 443 GHz. We report a 3$\sigma$ detection of LiH
toward B0218+357 with a column density of 1.4x10^{12} cm^{-2} and place an
upper limit on the ^6Li/^7Li ratio of <0.16. LiH was not detected toward any
other source.
