Dear Benjamin, you could light a church candle and the flame will give you some indication of a draught and its direction. Alternatively, you could light incense either in a thurible or as a taper and watch the resulting smoke. Decorative ribbon could also be used, if it is light enough. Lastly, a small, helium-filled,balloon tied to a piece of cotton thread could be a fourth method
best of luck Charles To get on or off this list see list information at http://www.cs.dartmouth.edu/~wbc/lute-admin/index.html
