Minor Thirds.
Thirds are fingered with the 1ˢᵗ and 3ʳᵈ, or the 2ⁿᵈ and 4ᵗʰ, also with the 3ʳᵈ and 4ᵗʰ fingers in a series of thirds.
Fourths.
Perfect 4ᵗʰˢ.
Augmented 4ᵗʰˢ.
Minor Thirds.
Thirds are fingered with the 1ˢᵗ and 3ʳᵈ, or the 2ⁿᵈ and 4ᵗʰ, also with the 3ʳᵈ and 4ᵗʰ fingers in a series of thirds.
Fourths.
Perfect 4ᵗʰˢ.
Augmented 4ᵗʰˢ.