§ MR. CAWLEYasked the First Commissioner of Works, Whether there is any objection to the adoption of the plan for the filtration of the air introduced into this House by passing it through cotton wools, which has been proved by experiment to be effectual for the removal of dust and other matters floating in the atmosphere, and whether he can state what would be the cost of such filtration?
LORD HENRY LENNOX,in reply, said, he understood that the experiments made by Dr. Percy of filter- 1689 ing air through cotton wool had been attended with very great success, and there would be no objection to apply the system to both Houses of Parliament if it were thought necessary. Meanwhile, he would remind the hon. Gentleman that the air supplied to that House was filtered through the finest cambric, which had almost the effect of the cotton wool. The cost of adopting the cotton wool plan would be a first outlay of about £200, with an annual charge for labour and material of from £50 to £100.