1) Brass instrument 
The sudrophone is a brass instrument invented by François Sudre (1844-1912). Its shape resembles that of an ophicleide. It was patented in 1892. It has a cylindrical bore and four Perinet valves. Its length is 86 cm and the bell diameter is 17 cm. The `valve` nearest the mouthpiece on the leadpipe controls a membrane to create a nasal effect, w.....