They have a nice collection of navigational instruments at the French Maritime Museum, so I thought I would share some with you. The little gadget shown above is called a ship log, and it is a way of determining the speed of the boat through water. This is the evolved form of throwing a chip of wood overboard and seeing how far it goes in a few seconds. In the above picture you can see a thirty second sandglass. The idea is to throw it overboard, let it float there for 30 seconds, while the ship moves away. The line has knots on it every so often and thus you can measure the speed of the boat.
If you are visiting the Eiffel tower and looking for something else to do, you might consider the French Maritime Museum at the Trocadero, the largest in the world. Apart from Napoleon’s canot, seen below, another striking feature in the first room at the Paris Musée de la Marine is the painting of the arrival of Napoleon III at Gênes in 1859, by Théodore Gudin seen above.
In 1748, Henri-Louis Duhamel du Monceau offered a collection of models of ships and naval installations to Louis XV of France, with the request that the items be displayed at the Louvre and made available to students of the Naval engineers school, which Duhamel headed. The collection was put on display in 1752, in a room of the first floor, next to the Academy of Sciences; the room was called “Salle de Marine” (Navy room), and was used for teaching. King Charles X decided to create the maritime museum in 1827, which he named the Musée Dauphin but after 1830 the name was changed to what we know it as today, the Musée de Marine.