French horn good intonation in scales: C Major 

Here are some good fingerings to play the C major scale on the standard double horn. These will achieve good harmonic intonation in major triads.
C E G F A C G B D
F0 F0 F0 B♭0 B♭0 B♭0 F0 F2 B♭1+2
C D. E F G A B C
F0 B♭1+2 F0 B♭0 F0 B♭0 F2 0