Text ( visual ) : unmediated Contributions to photographic optics / by Otto Lummer ; translated and augmented by Silvanus P. Thompson. -- London : Macmillan , 1900. -- xi, 135 p., [2] leaves of plates : ill. ; 23 cm. -- (BA25673093) ; https://ci.nii.ac.jp/ncid/BA25673093 Author Heading(s): Lummer, O. (Otto) ; Thompson, Silvanus P.