First and second Violins progressing with the Violas in octaves is a common method, especially when the lower octave in the melody happens to go below the open G string on the violins.

1. Vns (I or II)
Violas
>[8.

Example:

Snegourotchka 137, finale of Act I. Quick melody, piano.

2. Vns I + II
Violas
>[8 and 3. Vns I
Vns II + Violas
>[8.

These two distributions are not exactly the same. The first should be used to obtain greater brilliance in the upper part, the second to give the lower part a fuller and more cantabile quality.

Examples:

[No. 27.] Sadko, before 181.—

Vns I + II
Violas
>[8.

Quick animated passage, forte, introducing reiterated notes.