[Bridges & culvert syphons. Hydraulic engineering] "Situatie 's Bruggen"

Manuscript index book related to the bridges of Amsterdam, 1902. (2) pp. index of 68 bridges, followed by alphabetically organized leaves with thumb index, each letter with a list of bridges and a short description of each bridge. Partly unwritten; a few later corrections/deletions in coloured pencil + book of culvert syphons, 1913. Pre-printed leaves filled out by hand, each syphon numbered and with a table describing its condition and capacity from 1908 to 1913.

Both books folio size and with Stadsdrukkerij ticket to inside front board. Rare, intriguing insight into the hydraulic engineering works of Amsterdam. (total 2)