By means of one of the furnaces invented by Dr. Wm. Siemens, I have obtained even a more rapid and more complete combustion than before. The body employed was a severe test of its powers, for it weighed no less than 227 lbs., and was not emaciated. It was placed in a cylindrical vessel about 7 feet long, by 5 or 6 feet in diameter, the interior of which was already heated to about 2,000° Fahr. The inner surface of the cylinder is smooth, almost polished, and no solid matter but that of the body is introduced into it. The product, therefore, can be nothing more than the ashes of the body. No foreign dust can be introduced, no coal or other solid combustible being near it: nothing but heated hydrocarbon in a gaseous form, and heated air. Nothing is visible in the cylinder before using it--a pure, almost white, interior--the lining having acquired a temperature of white heat. In this case the gases, given off from the body so abundantly at first, passed through a highly-heated chamber, among thousands of interstices made by intersecting firebricks, laid throughout the entire chamber, lattice-fashion, in order to minutely divide and delay the current, and expose it to an immense area of heated surface. By this means they were rapidly oxidised, and not a particle of smoke issued by the chimney; no second furnace, therefore, is necessary by this method to consume any noxious matters, since none escape. The process was completed in fifty-five minutes; and the ashes, which weighed about 5 lbs., were removed with ease. After such brilliant results--results at once expeditious, cleanly, and economical--well might Sir Henry Thompson challenge Mr. Holland[187] 'to produce so fair a result from all the costly and carefully managed cemeteries in the kingdom,' and safely might he even offer him twenty years 'in order to elaborate the process.' [187] Medical Inspector of Burials for England and Wales. An ordinary Siemens' regenerative furnace for cremation makes use of only hot blast, it being considered that the organic substance to be consumed would supply sufficient hydrogen and carbon, and that only hot air is required to produce excellent results. But a perfect apparatus would be constructed upon the principle exhibited in Plate II., which represents the cremation apparatus devised by Dr. C. W. Siemens, F.R.S., of Westminster.