Stadt Zürich (ship, 1855) a few minutes. Thirteen men and eleven head of cattle died in this accident, making the sinking of the "Ludwig" by the "Stadt Zürich" the most serious shipping accident known at that time that had happened on Lake Constance. One consequence of the investigations into the disaster was an improvement in the signal regulations: in addition to the white bow light a green starboard and a red port light had to be carried. After the Bavarian ship, the "Ludwig" had sunk, the "Jura" was bought as a replacement, a ship which hitherto had worked on Lake Neuchâtel. She was dismantled,
Colour centre the recognition of shapes, motion, and colour. V1 has multiple areas that are colour-sensitive, which indicates that colour processing is not limited to one area. According to a paper by Dr Robert Shapley, V1 has an important role in colour perception. fMRI experimental results showed that V1 has two kinds of colour sensitive neurons: single-opponent and double-opponent cells. These cells are integral in the opponent process of interpreting colour signals. Single-opponent neurons respond to large areas of colour. This is advantageous for recognizing large colour scenes and atmospheres. In comparison, double opponent cells respond to patterns, textures, and colour boundaries.