John Miley, Systematic Theology (2 vols.; New York, Hunt & Eaton; Cincinnati, Cranston & Stowe, 1892, 1894) — Calvinist theologian Wayne Grudem says that this is probably the most scholarly and extensive of Arminian systematic theologies. It takes a governmental view of the atonement, which some Arminians embrace but many Arminians disagree with. The work may be accessed in various formats at these links: Volume 1 and Volume 2.
The attached file is a pdf of the combined “full text” option at each of those links, which seems to be a machine transcription of scans of the book and can have some typos as a result: Miley. Systematic Theology.