Fine Qum Silk and Wool Carpet, Persian, c.1950/60 Estimate: $1,500—2,500 CAD

Fine Qum Silk and Wool Carpet, Persian, c.1950/60

1935 Bugatti Type 57 Drophead Coupe

It is by now a commonplace observation that until their properties are determined by a particular experiment or measurement, quantum systems can have a dual or multiple nature — light can be both a wave and a particle, an electron can follow two distinct and inconsistent paths, and so forth. Niels Bohr, in a famous 1928 paper, “The Quantum Postulate and the Recent Development of Atomic Theory,” described this aspect of quantum theory as “complementarity.” As explained by historian of science Max Jammer, in his magisterial book “The Conceptual Development of Quantum Mechanics”: ”… Bohr asked himself how it is possible that [the equations governing radiation] relate together characteristics of radiation which, strictly speaking, are contradictory to each other: particle attributes energy and momentum, necessary for the description of the interaction of radiation with matter … and frequency and wave number, necessary for the description of the propagation of light, as in the phenomena of interference and diffraction... "It was this mutual exclusion and, at the same time, indispensability of fundamental notions and descriptions which led Bohr to the conclusion that the problem with which quantum physics found itself confronted could not be solved by merely modifying or reinterpreting traditional conceptions. What was needed, he concluded, was a new logical instrument. He called it “complementarity,” denoting thereby the logical relation between two descriptions or sets of concepts which, though mutually exclusive, are nevertheless both necessary for an exhaustive description of the situation.” Complementarity is one of the fundamental pillars of the so-called, and much-debated, “Copenhagen Interpretation” of quantum theory that is associated with Bohr and his followers. One of the profoundest philosophical questions posed by quantum theory is the nature of the underlying reality that is reflected in systems exhibiting complementarity. Does a quantum system have only one true underlying nature, governed by “hidden variables” that for some reason cannot be measured or determined? In other words, is complementarity merely an artifact of our incomplete knowledge of a system? Alternatively, do both (or all) of the complementary properties of a system coexist until the system is exposed to a particular measurement or experiment, which forces it to “make a choice”? Or do the relevant properties (e.g., wave or particle nature) simply not exist at all until an experiment is performed? Closely linked to these questions of the fundamental nature of the underlying reality of a quantum system are important terminological issues. Both Einstein and Bohr recognized the importance of finding appropriate words and phrases to describe quantum phenomena, while avoiding meaningless terminology and misleading analogies to more conventional phenomena. (This is made quite clear in, for example, their contributions to Paul Schilpp’s Festschrift “Albert Einstein: Philosopher-Scientist”. In his own essay in that collection, “Discussion with Einstein on Epistemological Problems in Atomic Physics,” Bohr stated that “the difficulties have their root not seldom in the preference for a certain use of language ….”) Hence, Heisenberg’s recollections in the letter offered here of the early discussions of the term “complementarity” are of the utmost importance. (Heisenberg was by no means merely an onlooker in those discussions. The historical and conceptual relationship between Heisenberg’s own principle of “uncertainty,” and Bohr’s principle of “complementarity,” is a much-discussed issue in the history of quantum theory. See Jammer.) In this letter from 1973, Heisenberg responds to a letter that had been sent to him by Herr Pfarrer Dr. Dr. Otto-Hubert Kost, pastor (Pfarrer) of the Hannover Christuskirche. (Dr. Kost’s letter is also included here.) Dr. Kost noted that Heisenberg had used the term “dualism” ("Dualismus") in discussions of complementarity, and suggested that “duality” (“Dualität”) might be a more appropriate term. (The distinction between the two terms may be more meaningful in German than in English.) Heisenberg’s response quickly passed over the sterile distinction between “duality” and “dualism,” and went on to recount (as translated from the original German): ”It might perhaps interest you that in 1927 when Niels Bohr tried to interpret quantum theory in philosophical terms, he thought over it for months and discussed with friends which words would be most appropriate to render it, and finally indicated it with the word ‘complementarity.’ Many possible expressions/terms were discussed at that time, and I recall that the word ‘duality’ was suggested as a possibility. However, Bohr did not want to see ‘two’ expressed so directly in the word, and hence finally decided to choose the concept ‘complementarity.’ This is because this concept suggests on the one hand that it deals with many images that complement one another but that, on the other hand, the intention of a unity is also expressed with the images. It was naturally always our opinion that dualism is only apparent, and that this truth is well-represented to us in the word ‘complementarity.’ [signed] W. Heisenberg” WITH: Beautiful classic large photogravure of Heisenberg signed in full [“Werner Heisenberg”] beneath the image in ink. Signed images of Heisenberg are rare. Also included are the original mailing envelope for the letter and the original letter from Dr. Kost. The Nobel Prize in Physics 1932 was awarded to Werner Karl Heisenberg "for the creation of quantum mechanics, the application of which has, inter alia, led to the discovery of the allotropic forms of hydrogen." Munich: 4 December, 1973. One sheet (approx. 8.25x11.75 in) of Heisenberg’s Max Planck Institute letterhead. With original mailing envelope and original letter by Dr Kost (one sheet). WITH: Signed photogravure. One sheet approx. 8x11.5 in; image approx. 5.5x7.5 in). All housed in custom box. Very light usual folds to letters, in fine condition. book, world map, history book

Typed Letter Signed [TLS]. WITH: Photogravure Signed

Claude LALANNE(1925-2019) 'Liseron' earrings - circa 1985 Galvanized copper Unique piece Stamped 'LALANNE' Dimensions: 2 ⅜ x 1 in. Provenance: Private collection, Paris Condition: Very good condition. Each item is vintage and may have signs of age.

Claude Lalanne (1925-2019), 'Liseron' earrings - circa 1985 - Unique

Vintage, "Unmistakably...the finest in the fine car field."

A Lincoln Light Up Sign

Lot of 150 Assorted Presidential Golden Dollars UNC. Manufacture/Country: U.S. Mint Face Value: $150 Total Metal & Percent: Copper 88.5% Net Weight: 8.1g each Mintage: 8.1g each Keywords: Money, Currency, Coins, tokens; Ref: BD2024

LOT OF 150 ASST PRESIDENTIAL GOLDEN DOLLARS UNC

OFFICE PORCELAIN DOOR SIGN AGS 91 SSP. C. 1920s. CONDITION: Brilliant color and gloss, showing unique and early script style with cobalt blue porcelain. Excellent condition field and mounting holes with light outer edge wear. A brilliant example. Condition: (9.0). Item Dimensions: 10" x 2.5". Condition:, Item Dimensions:

OFFICE PORCELAIN DOOR SIGN AGS 91

Large lot of approx. (450+) Green Bay Packers programs (GD-NM/MT). Years range from 1970-2014 (mainly 1980s-2000s) with some playoff games and Brett Favre's 200th start included. Duplication throughout the lot. Most appear to average EX-EX/MT overall, but each has not been individually examined page by page: GD-NM/MT

Large lot of approx

RIAA Platinum Album Award for Anita Baker album Rhythm Of Love. Released on Aug. 29, 1994, it was certified Platinum by the RIAA for one million copies sold on Oct. 28, 1994. The fifth album from Baker included the singles "Body and Soul", "You Belong to Me" (a cover of the Carly Simon track), and "I Apologize". The album picked up a Grammy nomination for Best R&B Album and "Body and Soul" was nominated for Best Female R&B Vocal Performance. The album reached at #3 on the Billboard Top 200 Albums chart, while topping the Billboard Top R&B/Hip Hop Albums tally. By 1995 it was certified 2x Multi-Platinum by the RIAA for two million copies sold.* Mouse Over to Zoom/Click to Enlarge Photos Item Highlights: Detailed Item Description: This RIAA Platinum Album award was manufactured in 1994, making it approx. 31 years old. It is presented to a The Hit Factory, the studio facility in New York City where parts of the album were recorded, along with its' owner Ed Germano. ® This RIAA Platinum Album award was manufactured in 1994, making it approx. 31 years old. It is presented to a The Hit Factory, the studio facility in New York City where parts of the album were recorded, along with its' owner Ed Germano. This award is in VG condition with very minor mars on the plexiglass and frame. The award is all original with Ill Eagle Enterprises manufacturer sticker . The numbered sticker on the back of the award is an inventory number from the recording studio/mastering facility. Interested in knowing more about RIAA awards and what makes them great to add to your collection? Subscribe to our free bi-weekly newsletter and get our free plus a 15% discount code . MusicGoldmine RIAA and Record Award Guide Interested in knowing more about RIAA awards and what makes them great to add to your collection? Subscribe to our free bi-weekly newsletter and get our free plus a 15% discount code . here Interested in knowing more about RIAA awards and what makes them great to add to your collection? Subscribe to our free bi-weekly newsletter and get our free plus a 15% discount code . otes on the condition of all vintage RIAA awards like this one: Please do not buy this item if you want a brand new piece of memorabilia. These are historical artifacts from the year they were produced. As a result they may show signs of wear. Frankly, if you see a 20 to 50-year-old award purported to be in 100% perfect condition, it might be too good to be true. After all, an antique should have "good' wear. If not, you might want to question the piece. As to where they came from, they could have been displayed in record label offices, recording studios, artist manager's offices, radio stations, private collector's homes and yes, of course, possibly the artist's or songwriter's home. Typically, we don't know all the places they may have been over the years other than what we've stated in the description. Finally, a word on photos: Our photos are zoomable so you can get a very good look. Do let us know if you want photos of any other details on our pieces and we'll be happy to provide. *RIAA sales data source: RIAA.com The Hit Factory® is a registered trademark of The Hit Factory Licensing LLC RIAA Platinum Album award In VG conditio Award from 1994 Presented to recording studio All original Known as a RIAA "R hologram" award, they were made from 1990-97 Award measures approx. 13" x 17” Greatcollectors item for any Anita Baker fa Greatcollectors item for any Anita Baker fa FREE insured shipping to continental U.S. International shipping available

Anita Baker Rhythm Of Love RIAA Platinum Album Award

Sarouk Carpet, Persian, c.1970/80 Estimate: $600—900 CAD

Sarouk Carpet, Persian, c.1970/80

1937 Morgan Sports Two-Seater Barrelback

Pablo PICASSO (1881-1973) Nature morte au crâne - 1960 Etching with aquatint in colors on Arches wove paper Signed lower right and numbered '16/150' lower left in pencil Edition of 150 numbered copies Publisher/Printer: Atelier Lacourière, Paris Dimensions (image) : 16 ¾ x 24 ½ in. Dimensions (sheet) : 22 x 29 ⅞ in. Literature : Based on a painting from 1947 (Zervos vol.XV, no.31) Provenance : Private collection, Germany Condition : Very good overall condition. Each item is vintage and may show signs of wear. Frame to order. © Succession Picasso 2025