Especially to make large prints of photographs negatives were made on glass (and not on celluloid). The collection of glass negatives has been scanned. For an overview, select this button and click on "display" on the bottom of this page.

To show pictures in a classroom, a magic lantern was used (until approximately the 2nd World War). For this machine special (large size) slides were made (8x8 cm). These slides are digitized and available in this gallery. For an overview, click on this category and then click on "display" on the bottom of this page. Projections with a magic lantern were only possible in full darkness because of the capacity of the lamp (increasing the light intensity would make the device too hot).

Because of the low light intensity of the magic lantern, projections has to be done in full darkness. This made it impossible to make notes for the students. Therefore also (coloured) posters have been made, with a size of approximately 1 m2.The posters were glued on textile and rolled for storage. Each poster was photographed and a small (black & white) photo with title and number was placed on an archive card. In this way the professor could select the required posters for his lecture and an assistant could collect them and hang them in the lecture room. The original posters do not exist anymore, but the cards survived and were digitized.

   Delta works

   Saemangeum

   Bahrain Causeway

   Closure from 1926

   sea dikes

   river dikes

   secondary dikes

Revetment structures

   General

   Block Revetments

   Asphalt revetment

   Elastocoast revetment

   Asphalt mats

   Geotextiles

Sea going ships

General cargo ship, roro ship

container vessel, lash vessel

dry bulk

liquid bulk

ferries

coasters and feeder ship

service vessels

passenger ships and cruise vessels

General

Inland container vessels

Inland bulk vessels, push convoys

Inland liquid vessels

Inland passenger ships

Inland service vessels

Meanders

River deltas

Ice discharge and ice problems

sediment transport

Scour in rivers

Scour by waves and tidal currents

Weirs and small barriers

Storm surge barriers     

Quay walls and mooring facilities
loading-unloading equipment
Locks, shiplifts, etc.

Bridges
Tunnels
Ferry landings
Aquaducts