These buttons are mainly for when this content window is loaded by the search engines without a menu.
Blue links lead to the completely translated html versions of the respective page or the respective point on this page, purple to pages whose start pages (as well as introductions and tables of contents at least) are already set up, grey means that no file or translation is available yet.)
Comments in this colour and between two / are from the operator of the German mirror site and translator.Copyright Dr. Eng. Jan Pająk
Img.173 (#G2e): On this photograph even the outlines of this groove from the tip of his nose is visible (i.e. the groove that is illustrated in more details on the photograph from Img.170 (#G1c).
