slots so that the dye streams delivered downwardly from the tubes in the two banks are at right angles to the yarns y which yarns travel in a plane slightly below the discharge ends of the adapters referring to fig8 the dye headers 42 and 43 are continuously supplied with dye through a conduit 48 48 39 fed by a pump 49 which receives dye from a dye mixer 50 an overflow conduit 51 connected in conduit 48 downstream from the pump 49 returns excess dye to the mixer 50 powdered dye is dissolved in tank 52 and is delivered by pump 53 and line 54 into mixer 50 and a recirculating line 55 connected in line 54 allows the dissolved powdered dye to be recirculated to insure proper dye solution a pair of excess dye recovery troughs 56 positioned below the slots 27 39 of reciprocating guides 24 and 25 at the two dyeing stations a and b collect and return excess dye from the tubes 45 through return conduits 57 to a holding tank 58 from which another pump 59 moves the dye through a return line 60 back to the dye mixer 50 the operation of the apparatus in the practice of the yarn space dyeing method is best understood by reference to fig3 through 6 fig3 to 5 show the constantly changing relationship of the moving web of yarns y to the fixed dye stream delivery tubes 45 caused by reciprocation of the guides 24 and 25 across the primary paths of movements of the yarns at dyeing stations a and b fig3 shows the reciprocating slotted yarn guide 24 at.