1. IOR/Z/E/4/18/A1221 Reference (shelfmark): IOR/Z/E/4/18/A1221 Title: Army, Ordnance and Small Arms, Guns, Tangent scale of Field Guns, table of natural tangents printed as a guide for graduating Collection Area: India Office Records and Private Papers Languages: English Date Range: 1844-1846 Extent: 1 entry