Percy, Le Baron P; Comet, C-J-BBiblio.com
5 résultats
1827e6016Paris: Chez Melle Delaunay. Worn condition. Cover detached. Segments becoming loose.Scattered browning. Ex.-lib. Royal College of Surgeons in Ireland with minimal marking. 1827. First Edition. Paperback. 220mm x 140mm 9" x 6". xxxii 296pp. 2 engraved portraits. . Chez Melle Delaunay paperback
186245927Uppsala C.A. Leffler 1862. 4to. Later blank boards. Uncut. Offprint from "Nova Acta Reg.Soc. Sc. Ups.". 10 pp. and 1 folded plate. <br/><br/><em>First edition. In this paper Ångström deduces the mean period of Halley's Comet by a statistical approach. From his analysis he discovered that the average time between perihelions was 76.93 years and found that thsi period varied in a cyclical manner.Ångström was one of the early formulators of the science of modern spectroscopy; he wrote extensively on terrestrial magnetism the conduction of heat and especially spectroscopy. He published a monumental map of the normal solar spectrum that expressed the length of light waves in units of one ten-millionth of a millimeter a unit of length now known as the angstrom. He discovered that hydrogen is present in the sun's atmosphere and he was the first to examine the spectrum of the aurora borealis. </em> hardcover
181035978København S. Popp 1810. 4to. Uden omslag som udkommet i Videnskabernes Selskabs Skrifter. 79 pp. samt 3 kobberstukne foldeplancher. <br/><br/><em>I afhandlingen afbilder den ene planche af stjernehimlen kometens bane som den blev iagttaget i København fra begyndelsen af oktober 1807. Blandt de detaljerede beregninger og beskrivelser af kometen indeholder afhandlingen også en paragraf hvori Bugge forsøger at eliminere frygten for de skadevirkninger kometen kunne forsage. Om sandsynligheden for et sammenstød med Jorden skriver Bugge:"man kan vædde Qvadratet ef et uendeligt stort Tal imod een at Jordens Sammenstød med en Comet ej nogensinde vil indtræffe." </em> unknown
184857498Paris 1848-1851. 280x220mm. 342 338Êpages 344 pages demi-veau dorure du dos passe plats papier marbr. 3000 unknown
188434974Aberdeen: George Middleton 1884-85. Eight issues in one volume 8vo 11 1 12 12 11 1 12 11 1 13 1 10 pp. Bookplate of Edinburgh Public Libraries to paste down marked "withdrawn" plus small ink stamps to the first and last pages. Contemporary half cloth marbled sides neatly rebacked. An extremely scarce run of these radical Aberdeen pamphlets published anonymously under a variety of pseudonyms - Bearing-Rein Chronos A Ratepayer Brother Jack Recluse and Notarius. A Jubilee issue also appeared in 1887. OCLC lists a handful of single issues plus a complete set at Aberdeen University. Aberdeen: George Middleton unknown
