We report on a comparative study of nearby shocked clouds with and wit
hout star formation, based on IRAS, HI(21 cm), CO(1 - 0) NH3 (and othe
r molecular line) observations. The dark clouds L1780 (no star formati
on) and L1251 (high SFE) are discussed here. Their density and velocit
y structure are compared with the predictions of the RD model of Horva
th & Toth (1995), Paper I.