An edition of Madeira spectroscopic (1882)

Madeira spectroscopic

being a revision of 21 places in the red half of the solar visible spectrum, with a Rutherfurd diffraction grating at Madeira (Lat. = 32 ̊38' N., Long. = I[superscript h] 8[superscript m] W.) during the Summer of 1881

By C. Piazzi Smyth