Chair: Comrie, Peter
Papers:
Sommerville, Duncan M Y: "Some applications of spherical geometry to geometrical optics", [Title] {Communicated by Edmund Taylor Whittaker}
Sommerville, Duncan M Y: "Note on the minimum duration of twilight", [Title] {Communicated by Edmund Taylor Whittaker}
Miller, Thomas Hugh: "Note on the radical axis of intersecting circles", [Title] {Communicated by Peter Ramsay}
Muirhead, Robert Franklin: "Rolling loads: a new graphical method", {Communicated by Ellice Martin Horsburgh}