IN a recent paper1 we reported on a new band system of aluminium hydride lying at 3380 A. We have now succeeded in photographing this band system in the second order of a 6.5 m. concave grating. As light-source we used an aluminium arc burning in a hydrogen atmosphere at a pressure of 15 mm. with high current (15 amp.).
Z. Phys., 89, 40; 1934.