Mr. BUCKALEW. I will say a few words more, and then I will leave the subject. This plan which we will have will be substantially that which obtains in the House of Commons at London. After expending over $2,000,000 in cigieriments in improving the ventilation of the cases of Parliament, in 1854, the whole subject was turned over to Goldsworth y Gurney, who proceeded to adopt. a plan involviii 2 principles: 1st the use of Windows aroun the whole upper elevation of the hall; and, 2nd ly, the downward movement of the air through the hall, for the purpose of ventilation. In 1852 there was a arliamentary committee which made an cla crate report. In 1864 another committee sat during one half, perhaps the entire session of Parliament. Their report constitutes a large volume in the congressional Library. Lord Palmerston was a member of the committee, and must have expended 2 or 3 weeks of his valuable time in service upon it, prominent as he was in the Government of that country and in the conn cils of Parliament. They ventilated the House of Commons by the use of windows, precisely as we propose, in the upper elevation of their hall, when the temperature of the external atmosphere admits of it, and they warm their air at all times, when they do not use the external air directly, and bring it into the hall above and remove it at the floor. Although they had expended the enormous amount which I have mentioned in experiments before, on all sorts of plans, such as I have heard discussed for 2 or 3 sessions about the Capitol, they adopted this plan of 1354, and from that day down to this the parliamentary papers are a blank 0n the subject of ventilation; so perfect and so entirely successful was this system of windows in the upper elevation of the hall, and downward movement of the air. Besides that, the legislative chambers at Paris and the public buildings in that city are ventilated on precisely these principles. A recent elaborate work of General Ii orin was sent for to Paris during the last year, and has been thoroughly examined. It is alluded to in our report. ehave, in short, the high est scientific opinion in favor of the principles of our plan of improvemenlt le, adainng we have also the cases of the House of commons and other public structures in GreatBritain and the public buildings in Paris. It is idle for us to seek for information in this country, to call men who have a smattering of information on the pics of this kind before us and reduce their evidence to writing. If we had 20 volumes of such testimony we could not have the guarantees for success for this plan which we have from the facts which I have stated.