The veinlet, VV, shows a very fine grained structure due to metasomatic replacement of country rock by the irregular veins of calcite. Photographer: Unknown
Scope & Content:
Genre: Scientific Photography Photomicrograph, circular image, mounted facing p. 158.
Microsection of Syenitic Rock showing the occurrence of metallic sulphides as original constituents of igneous rocks. Black grains consist of PbS and FeS. Photographer: Unknown
Scope & Content:
Genre: Scientific Photography Photomicrograph, circular image, mounted facing p. 162.
Mikrotipie. Der Föhren-Spinne. 3000 Mal vergrössert. [Photomicrograph. The pine-spinner, enlarged 3000 times.] Photographer: Heeger, Ernst
Scope & Content:
Genre: Scientific Photography Photomicrograph of the larva of the silkmoth Bombyx pini, with descriptive on pp. 26-27 text by Ernst Heger [Heeger], who was also presumably responsible for the photograph. A similar photograph of the same specimen also appears in Auer’s ‘Der Polygraphische Appara...