Zeiss Spectro-Comparator Pamphlet 1931
SKU
BR5644/Zeiss Spectro-Comparator Pamphlet 1931
Very Good condition. 4 page pamphlet Bms 54 e. Carl Zeiss Jena, 1931.for the measurement of stellar spectra, for the pupose of determing the velocity of star in the line of sight on the Doppler principle of line-displacement.