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The Editors of Popular MechanicsBiblio.com

Popular Mechanics Workshop: Outdoor Woodworking

The Mechanics' Magazine, Museum, Register, Journal, and GazetteBiblio.com

The Mechanics' Magazine Museum Register Journal and Gazette

1823974F5London: J. C. Robinson; Knight and Lacey; M. Salmon 1823-1842 . First edition. Cloth. Good Only. 9" by 6.5". Not Stated. Eight informative and illustrated first edition volumes of 'The Mechanics' Magazine' a periodical from the nineteenth century covering important developments in the world of mechanics including the very scarce first volume. Eight volumes of this periodical bound in seven. Multi-volume sets of this work are scarce.Present here are volumes I III XX XXI XXIV XXXII and XXXVI-XXXVII.An interesting snapshot of the scientific and technological developments of this period towards the end of the Industrial Revolution including discussion of Tantalius's Cup a memoir of James Watt account of the London fires of 1833 hydraulic projectors the parallax of mars and further diverse subjects.With full page and vignette illustrations and diagrams throughout.Present here are:Volume I August 30 1823 - March 6 1824. Rebound in cloth with endpapers renewed. Lacking the volume title page to the start of the work.Volume III September 26 1824 - March 19 1825. In a half calf binding with a frontispiece.Vol. XX October 5 1833 - March 29 1834. In a half calf binding with a frontispiece.Vol. XXI April 5 1834 - September 27 1834. In a half calf binding with a frontispiece.Vol. XXIV October 3 1836 - April 2 1836. In the publisher's original half cloth binding with frontispiece.Vol. XXXII October 5 1839 - May 30 1840. In a half calf binding.Vols. XXXVI-XXXVII January 1st 1842 - December 31st 1842. In half calf. Library bookplate to front pastedown of volume III with library stamps to endpapers. Bookplate to front pastedown of vol XX. Five half calf volumes - one repaired with tape to the back strip - one half cloth volume and one full cloth volume. Endpapers of volume I renewed. Volume XX lacking back strip with joints starting and boards tender. Joint heads and tails of volume III starting with boards holding firm. Vol XXIV joints starting with boards a touch tender. Front joint head of vol XXXII starting with board firmly held. Rear joint of vols XXXVI- II starting with board tender. Hinges of vol XXI strained and a touch tender. Library bookplate to front pastedown of volume III with library stamps to endpapers. Bookplate to front pastedown of vol XX. Internally firmly bound. Pages of earliest volumes age toned with spotting throughout with later volumes generally clean and bright. Good Only J. C. Robinson; Knight and Lacey; M. Salmon hardcover

Rooke Books · Royaume-Uni490,00 £GB≈ 559,48 €

VAN VLECK, JH - TOWARDS QUANTUM MECHANICS, THE CORRESPONDENCE PRINCIPLE J HBiblio.com

The Absorption of Radiation by multiply periodic Orbits and its relation to the Correspondence Principle and the Rayleigh-Jeans Law. Part I- II. I. Some Extensions of the Correspondence Principle. - II. Calculation of Absorption by multiply period.

192447166Corning N.Y. and Menasha Wisc. The Physical Review 1924. Royal8vo. Full buckram. Gilt lettering to spine. A stamp to top of titlepage and to front free endpaper. In: "The Physical Review. A Journal of Experimental and theoretical Physics" Vol. 24 Second Series. V704 pp. textillustr. Van Vleck's papers: pp. 330-346 a. pp. 347-365. Internally clean and fine. <br/><br/><em>First appearance of Van Vleck's two importent papers in which he clarifies and extends the Principle of Correspondence."Van Vleck made his greatest contribution to the old quantum theory in 1924 when he conceived his correspondence principle for absorption. He demonstrated that in the limit of high quantum numbers there would be a correspondence between absorption by classical multiply periodic systems and by their quantum analogues. His proof depended on interpreting net absorption in the quantum theory as the difference between gross absorption and stimulated emission of radiation an interpretation prompted by a remark of Breit’s. Van Vleck was particularly pleased that his classical theory reproduced the quantum result without the need for stimulated emission which he referred to as "negative absorption." DSB."Van Vleck’s theory of absorption by multiply periodic systems was consistent with the newly derived Kramers theory of dispersion and it convinced Bohr that his correspondence principle applied not only to emission but also to absorption. Further Van Vleck’s 1924 calculation made use of several of the ideas that Werner Heisenberg used in his matrix mechanics a year later. Van Vleck’s work however did not lead in the direction of matrix mechanics. His intent was to explain quantum phenomena especially "negative absorption" in classical terms rather than to devise an internally consistent quantum theory." DSB.In 1977 he shared the Nobel Prize with Philip Anderson and N. F. Mott.Van der Waerden "Sources of Quantum Mechanics" pp. 203 ff. </em> hardcover

Herman H. J. Lynge & Søn A/S · Danemark3 000,00 DKK≈ 402,90 €