- Scattered library (cancel) stamps, i.a. "Bibliotheek Koninklijk Instituut van ingenieurs (...) Den Haag" at beginning and end and mainly on title-p. Backstrip dam. and partly worn away; frontwr. loose.
= Nikolay Yegorovich Zhukovsky (1847-1921) was a Russian scientist, mathematician and engineer, and one of the founding fathers of modern aero- and hydrodynamics.