The object of the author was to lay before the Society the result of an investigation into the state of the air usually respired in public buildings in this country and on the continent, to shew that the amount of air usually allowed for respiration is far below what is necessary to sustain the system in a healthy tone, and to give an account of the various experiments and observations upon which this opinion was founded.

He entered also into an examination of the method that ought to be adopted in introducing and regulating the supply in different apartments.