1859.] Pi'of' Tyndall, on the Transmission of Heat, 155 



The following Presents were announced, and the thanks of the 

 Members returned for the same : — 



From 

 Lords CommisBioners of the Admiralty — Professor Piazzi Smyth's Report on the 



TenerilFe Astronomical Experiments of 1856. 4to. 1858. 

 American Philosophical Society — Proceedings, Nos. 57, 58. 8vo. 1857. 

 Anonymous— The Mutinies and the People ; or Statements of Native Fidelity, 

 exhibited during the Outbreak of 1857-8. By a Hindu, ^vo. Calcutta, 1859. 

 Arts, Society o/*— Journal lor May 1859. 8vo. 

 Astronomical Society, Royal— Monthly Notices, May 1859. 8vo. 

 Barlow, Rev. John, M.A. F.R.S. V.P. ^ Sec. i?./.— Rev. T. Reynolds, Iter 

 Britanniarum : or, that Part of the Itinerary of Antoninus which relates to 

 Britain, with a New Comment. 4to. 1 799. 

 Bell, Jacob, Esq. iW.jS./.— Pharmaceutical Journal for May 1859. 8vo. 

 Boosey, Messrs. {the Publishers) — The Musical World for May 1859. 4to. 

 British Architects, Institute oj — Proceedings for May 1859. 4to. 

 Editors— T\iQ Medical Circular for May 1859. 8vo. 

 The Practical Mechanic's Journal for May 1859. 4to. 

 The Journal of Gas- Lighting for May 1859. 4to. 

 The Mechanics' Magazine for May 1 859. 8vo. 

 The Athenaeum for May 1859. 4to. 

 The Engineer for May 1859. fol. 

 The Artizan for May 1859. 4to. 

 The Horological Journal, No. 10. 8vo. 1859. 

 Faraday, Professor, D.C.L. F.i?. 5.— Repertoire de Chimie, par C. Barreswil und 



A. Wurtz. No. 8. 8vo. Paris 1859. 

 Franklin Institute of Pennsylvania— iowm3i\,Yo\.^XXVll. No. 5. 8vo. 1859. 

 Geological Society — Proceedings for May 1859. 8vo. 

 Holland, Sir Henry, Bart. M.D. F.R.S. V.P.R.I.-^M. F. Maury's Sailing 



Directions. 8th Ed. 2 vols. 4to. Washington, 1858-9. 

 Lincoln's- Inn, Hon. Society of— Catalogue of the Printed Books in the Library. 



By W, H. Spilsbury, Librarian. 8vo. 1859. 

 Mosley, Sir Oswald, Bart. M.R. I. (the Author) — A Short Account of the Ancient 



British Church. 16to. 1858. 

 Newton, Messrs. — London Journal (New Series), for May 1859. 8vo. 

 Novello, Mr. {the Publisher)— The Musical Times, for May 1859. 4to. 

 Photographic Society— Journal, No. 85. 8vo. 1859. 



WEEKLY EVENING MEETING, 



Friday, June 10, 1859. 



The Prince Consort, Vice-Patron, in the Chair. 



John Tyndall, Esq. F.R.S. 



PBOFESSOE or NATURAL PHILOSOPHY, ROYAL INSTITOTION. 



On the Transmission of Heat of different qualities through Gases of 

 different kinds. 



Some analogies between sound and light were first pointed out : a 

 spectrum from the electric light was thrown upon a screen — the spec- 

 trum was to the eye what an orchestra was to the ear — the different 



