A partnership interest is one owned by several persons in partnership for partnership purposes.
§ 70-1-312, MCA
En. Sec. 1106, Civ. C. 1895; re-en. Sec. 4439, Rev. C. 1907; re-en. Sec. 6681, R.C.M. 1921; Cal. Civ. C. Sec. 684; Field Civ. C. Sec. 177; re-en. Sec. 6681, R.C.M. 1935; R.C.M. 1947, 67-311.