Spectra of Cloud 56. Positions are indicated on the x and y axes as offsets in arcminutes and each box represents 30″. ¹²CO is in black, ¹³CO in red, HCO⁺ in green and HCN in blue. The velocity scale goes from −107.5 km s⁻¹ to −99 km s⁻¹. The temperatures scales are −.7 to 7K for ¹²CO, −.14 to 1.4K for ¹³CO, −.02 to .2 for HCO⁺ and for HCN. The HCN line (only central component shown) has been multiplied by 9/5 so that the line intensity represents the total line flux for comparison with other species. The spectra in the corners show only CO as not all positions were observed in HCN and HCO⁺.