I have a question about the illustration in lesson 17. It is the illustration which is placed after:
No. 164. Legend of Kitesh, before Section256 - 2 Oboes, Eng. Horn an octave above 3 Horns (+).
Third row, first bar, bass key. Four notes – C, G, C, E are assigned to 3 Tr’bni. It is obvious that there is one note more than the trombones. Which instrument plays the 4-th note? (Or is it 4 trombones instead of 3?)
Very observant of you, unless three trombones can play four notes simulataneously, this is most likely an error. This was in the score in the original text so I am not sure what Rimsky-Korsakov intended. Perhaps it should have been 4 trombones instead of 3 as you suggested.
Robert pointed out that it is most likely a tuba was inadvertently omitted by the original author. Going through all the examples, RK never seemed to use 4 trombones. Robert also did a quick file of 4 trombones and 3 trombones/tuba and the later made more sense musically.