be discussed are the science of cold, the industrial production of cold, the application of cold to alimentation and to other industries, transport, and legislation. The first Congress, held at the Sorbonne in Paris, was attended by some thousands of delegates, including official representatives of forty-three different states, and nearly one hundred persons from England, and success seems already secured for the Second Congress at Vienna. His Imperial Royal Highness, the Archduke Leopold Salvator, at the request of the Emperor of Austria, is acting as patron of the Congress, and receptions will be given to the delegates by the Court, and by the towns of Vienna, Budapest, &c. A representative and influential British Committee is now in course of formation, and the British Colonies are giving their support. Any of our readers who may care to submit a paper, or to attend the Congress, are invited to communicate with R. M. LEONARD, Hon. Secretary for the United Kingdom, 3, Oxford Court, Cannon Street, London, E.C. MEETINGS FOR THE WEEK. MONDAY, 14th.-Royal Society of Arts, 8. (Cantor Lectures). "The Petrol Motor," by Prof. W. Watson, D.Sc., F.R.S. TUESDAY, 15th.-Royal Institution, 3. "The Emotions and their Expression," by Prof. F. W. Mott, F.R.S., &c. WEDNESDAY, 16th.-Royal Society of Arts, 8. "The Lifeboat and its Work," by Sir John Cameron Lamb, C.B. Microscopical, 8. "Dendobra hia fallax, a Rare and Divergent Antipatharian," by the President. "Measurement of the First Nine Groups of Grayson's Finest Twelve-band Plate" and Measurement of the Diameter of the Flagella of the Cholera Bacillus prepared by Loffler's Method," by A. A. C. E. Merlin. Exhibition of Mounted Specimens of Fresh-water Medusa, by C. F. Rousselet. THURSDAY, 17th.-Royal Institution, 3. "Illumination, Natural and Artificial" (Experimentally Illustrated), by Prof. S. P. Thompson, F.R.S. u Royal Society of Arts, 4.30. "The Bombay Housing Question," by George O. W. Dunn, M Inst.C.E. Royal Society. "Phosphorescence produced by a- and -Rays," by E. Marsden. "Theory of the Luminosity produced in certain Substances by Rays," by E. Rutherford. "The Scattering of the -Particles by Matter" and "The Ionisation produced by an a-Particle-Part II., Connection between Ionisation and Absorption," by H. Geiger. "Influence of Pressure on the Boilingpoints of Metals," by H. C. Greenwood. cosities of the Gases of the Argon Group," by A. O Rankine. "Vis Chemical, 8.30. Julius Thomsen Memorial Lecture, FRIDAY, 18th.-Royal Institution, 9. "Halley's Comet," by Prof. WORCESTERSHIRE COUNTY COUNCIL. Wanted, a SENIOR and a JUNIOR ASSISTANT in the County Chemical Laboratory. in APRIL next. They will be required to assist in the Analysis of Foods, Drugs, Waters, &c. Senior Assistant's salary £150 per annum ; Junior Assistant's salary £100 per annum. Applications, marked "Senior" or "Junior" Assistant, should be forwarded with three recent testimonials to the CoUNTY ANALYST, Shire Hall, Worcester, not later than FEBRUARY 28th, 1910. Previous experience in the Analysis of Foods and Drugs essential. (0.247). PROCESS FOR THE PRODUCTION OF NITRIC OXIDE AND NITRIC ACID FROM AIR OR OTHER MIXTURE OF OXYGEN AND NITROGEN (No. 5540 of 1904).-The Patentee is desirous of arranging by License or otherwise, on reasonable terms, for the manufacture and commercial development of the invention in this country.-Address, HERBERT HADDAN and CO., Patent Agents, 31-32, Bedford Street, Strand, London, W.C., NEWS MACMILLAN'S NEW and RECENT BOOKS ON CHEMISTRY. Crystalline Structure and Chemical Constitution. By A. E. H. TUTTON, M.A., D.Sc. (Oxon.), F.R.S., A.R.C.Sc. (Lond.). 8vo. 5s. net. This is the first volume of a new Series of Science Monographs which it is believed will receive the close attention of the scientific world. 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