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• Petrus_Peregrinus_de_Maricourt abstract "Petrus Peregrinus de Maricourt (Latin), Pierre Pelerin de Maricourt (French), or Peter Peregrinus of Maricourt (fl. 1269), was a 13th-century French scholar who conducted experiments on magnetism and wrote the first extant treatise describing the properties of magnets. His work is particularly noted for containing the earliest detailed discussion of freely pivoting compass needles, a fundamental component of the dry compass soon to appear in medieval navigation. He also wrote a treatise on the construction and use of a universal astrolabe.Peregrinus’ text on the magnet is entitled in many of the manuscripts of it Epistola Petri Peregrini de Maricourt ad Sygerum de Foucaucourt, militem, de magnete ("Letter of Peter Peregrinus of Maricourt to Sygerus of Foucaucourt, Soldier, on the Magnet") but it is more commonly known by its short title, Epistola de magnete ("Letter on the Magnet"). The letter is addressed to an otherwise unknown Picard countryman named Sygerus (Sigerus, Ysaerus) of Foucaucourt, possibly a friend and neighbor of the author; Foucaucourt borders on the home area of Peregrinus around Maricourt, in the present-day department of the Somme, near Péronne.In only one of the 39 surviving manuscript copies the letter also bears the closing legend Actum in castris in obsidione Luceriæ anno domini 1269º 8º die augusti ("Done in camp during the siege of Lucera, August 8, 1269"), which might indicate that Peregrinus was in the army of Charles, duke of Anjou and king of Sicily, who in 1269 laid siege to the city of Lucera. However, given that only one manuscript attests this, the evidence is weak. There is no indication of why Peter received the sobriquet Peregrinus (or "pilgrim"), but it suggests that he may have been either a pilgrim at one point or a crusader; and the attack on Lucera of 1269 had been sanctioned as a crusade by the Pope. So Petrus Peregrinus may have served in that army."You must realize, dearest friend," Peregrinus writes, "that while the investigator in this subject must understand nature and not be ignorant of the celestial motions, he must also be very diligent in the use of his own hands, so that through the operation of this stone he may show wonderful effects."".
• Petrus_Peregrinus_de_Maricourt alias "Maricourt, Petrus de".
• Petrus_Peregrinus_de_Maricourt thumbnail Epistola-de-magnete.jpg?width=300.
• Petrus_Peregrinus_de_Maricourt wikiPageExternalLink letterofpetrusp00pieriala.
• Petrus_Peregrinus_de_Maricourt wikiPageExternalLink article-9059211.
• Petrus_Peregrinus_de_Maricourt wikiPageExternalLink 12079e.htm.
• Petrus_Peregrinus_de_Maricourt wikiPageExternalLink peregrin_sum.htm.
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• Petrus_Peregrinus_de_Maricourt wikiPageID "2756109".
• Petrus_Peregrinus_de_Maricourt wikiPageRevisionID "599420379".
• Petrus_Peregrinus_de_Maricourt alternativeNames "Maricourt, Petrus de".
• Petrus_Peregrinus_de_Maricourt hasPhotoCollection Petrus_Peregrinus_de_Maricourt.
• Petrus_Peregrinus_de_Maricourt name "Peregrinus, Petrus".
• Petrus_Peregrinus_de_Maricourt shortDescription "Early investigator of magnetism".
• Petrus_Peregrinus_de_Maricourt description "Early investigator of magnetism".
• Petrus_Peregrinus_de_Maricourt description "Early investigator of magnetism".
• Petrus_Peregrinus_de_Maricourt subject Category:13th-century_French_people.
• Petrus_Peregrinus_de_Maricourt subject Category:13th-century_births.
• Petrus_Peregrinus_de_Maricourt subject Category:13th-century_deaths.
• Petrus_Peregrinus_de_Maricourt subject Category:13th-century_scientists.
• Petrus_Peregrinus_de_Maricourt subject Category:French_physicists.
• Petrus_Peregrinus_de_Maricourt subject Category:French_science_writers.
• Petrus_Peregrinus_de_Maricourt subject Category:High_Middle_Ages.
• Petrus_Peregrinus_de_Maricourt subject Category:Magneticians.
• Petrus_Peregrinus_de_Maricourt subject Category:Science_in_the_Middle_Ages.
• Petrus_Peregrinus_de_Maricourt type 13th-centuryFrenchPeople.
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• Petrus_Peregrinus_de_Maricourt comment "Petrus Peregrinus de Maricourt (Latin), Pierre Pelerin de Maricourt (French), or Peter Peregrinus of Maricourt (fl. 1269), was a 13th-century French scholar who conducted experiments on magnetism and wrote the first extant treatise describing the properties of magnets. His work is particularly noted for containing the earliest detailed discussion of freely pivoting compass needles, a fundamental component of the dry compass soon to appear in medieval navigation.".
• Petrus_Peregrinus_de_Maricourt label "Pedro de Maricourt".
• Petrus_Peregrinus_de_Maricourt label "Peter Peregrinus de Maricourt".
• Petrus_Peregrinus_de_Maricourt label "Petrus Peregrinus de Maricourt".
• Petrus_Peregrinus_de_Maricourt label "Petrus Peregrinus de Maricourt".
• Petrus_Peregrinus_de_Maricourt label "Petrus Peregrinus".
• Petrus_Peregrinus_de_Maricourt label "Pierre de Maricourt".
• Petrus_Peregrinus_de_Maricourt label "ペトルス・ペレグリヌス".
• Petrus_Peregrinus_de_Maricourt sameAs Petrus_Peregrinus_de_Maricourt.
• Petrus_Peregrinus_de_Maricourt sameAs Peter_Peregrinus_de_Maricourt.
• Petrus_Peregrinus_de_Maricourt sameAs Pierre_de_Maricourt.
• Petrus_Peregrinus_de_Maricourt sameAs ペトルス・ペレグリヌス.
• Petrus_Peregrinus_de_Maricourt sameAs Petrus_Peregrinus.
• Petrus_Peregrinus_de_Maricourt sameAs Pedro_de_Maricourt.
• Petrus_Peregrinus_de_Maricourt sameAs m.080y2c.
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• Petrus_Peregrinus_de_Maricourt sameAs Petrus_Peregrinus_de_Maricourt.
• Petrus_Peregrinus_de_Maricourt wasDerivedFrom Petrus_Peregrinus_de_Maricourt?oldid=599420379.
• Petrus_Peregrinus_de_Maricourt depiction Epistola-de-magnete.jpg.
• Petrus_Peregrinus_de_Maricourt givenName "Petrus".
• Petrus_Peregrinus_de_Maricourt isPrimaryTopicOf Petrus_Peregrinus_de_Maricourt.
• Petrus_Peregrinus_de_Maricourt name "Peregrinus, Petrus".
• Petrus_Peregrinus_de_Maricourt name "Petrus Peregrinus".
• Petrus_Peregrinus_de_Maricourt surname "Peregrinus".