[Title: Snow Trials at Rockcliffe] [Remark: demonstration by the department of National Defence on the occasion of the 44th Annual Meeting of the Canadian Engineering Institute.] Shot of General AGL McNaughton welcoming Governor general Willingdon as he arrives for test. HAS of Willingdon inspecting vehicles to be tested. Shot of Willingdon, McNaughton and Colonel Greer, Director of Supply and Transport. Shot of vehicles moving around speedway. Shot of four wheel drive truck with chains stuck in snowbank. Shot of four wheel drive truck plowing through snow, of thorneycroft six wheeler with traces, of light Morris six wheeler, of Leyland vehicle with skis and tracks, of fast Ford snowmobile, of Lynn tractor carrying five ton load. Shot of Colonel Robinson, officer commanding, RCASC workshop, Captain Parker, assistant Director of Supplies and Transports. Various shots of vehicles. Various interior and exterior shots of Wedell-Williams air racer, including CUs of motor, control panel, stick, rudder controls. Shot of aircraft taking off, flying over field. (13/02/1930) [Titles interspersed]