one wheel makes a sound to be heard to the other. After the pattern of Is. vi. 3: “and one cried unto another, and said etc.” A parallel to the present verse occurs Mass. Hek. vii: “and one Bath Ql by the side of one wheel (referring to the ‘wheels of the Merkaba’) and another Bath Qól by the side of another wheel ; in that moment one wheel causes (its voice) to be heard to another wheel with thunder and earthquake. ..(saying) ‘Extol to him that rideth in ‘Avaboth, by his name Jah, and rejoice before him’”’. The psalm here cited is the one specifically used in mystical interpretations. There are several cabbalistic commentaries on this psalm. The special attention of the mystics was drawn to this psalm already in the tannaitic period if not earlier. From the vs. referred to here, the name of the highest of the heavens, ‘Araboih, was deduced (cf. Chag. 12 b). Other passages of this psalm to which special interest was devoted are vss. 17 and 18. Elsewhere the Galgallim of the Merkaba are stated to partake in the celestial Qédushsha, e.g. in the quotation, YR. v. 5 b: “the wheels of the Merkaba say: ‘Blessed be the Glory of H’ from his place etc.’”’ fire: and glorifies them, when they give praise and glory and re- joicing and he causes them to make haste to say ? '* Holy " and *' Blessed be the Glory of H’ from his place!” (i.e. the Qédushsha).