‎LEYDEN Lucas Van‎
‎Le Sauveur‎

‎Systeme général des Intervalles des Sons, & son Application à tous les Systèmes & à tous les Instrumens de Musique. Par M. Sauveur. - [ THE SCIENTIFIC FOUNDATION OF HARMONICS - COINING THE TERM ""ACOUSTICS""]‎

‎Paris, Jean Boudot, 1704. 4to. Without wrappers. Extracted from ""Mémoires de l'Academie des Sciences. Année 1701"". Title-page to Année 1701 with an engraved vignette. Pp. 297-364 a. Corrections & Remarques Pour le Systeme de Musique (2) pp. With 3 large folded engraved plates. A few scattered brownspots. Wide-margined.‎

‎First appearance of a founding paper in musical theory and the physics of acoustics, in which the term ""acoustique"" is coined. The paper deals with the relations of the tones of the musical scale. It established the practice of music upon a science superior to it which Sauveur calls ""Acoustics"", the subject of which is sound in general. This is Sauveur's main paper on acoustics in which he states the first clear recognition of the composite nature of the vibration of strings.""Like Mersenne and others in the Seventeenth century, Sauveur used musical experience to obtain information on sound and vibration. According to Fontenelle, Sauveur was fascinated by music, even though he had no ear for it, and consulted frequently with musicians. Despite the musical foundation of his work, Sauveur proposed the development of a new subject, which he named ""acoustique"", dealing with sound in general rather than with the ""son agréable"" of music."" (DSB XII, p. 127).""Joseph Sauveur (1653-1716) introduces the term ""acoustics"" for the study of sound and examines the relations of the tones of the musical scale in the memoir ""Systeme général des intervalles...."" (General System of sound intervals and its application to all musical systems and instruments) - the paper offered - He shows that a string can vibrate at integral multiples of a a fundamental frequency simultaneously with vibrating at the fundamental frequency itself, callinf the toned produced by the vibrations at the multiples the ""harmonics"" of the fundamental tone.""(Parkinson ""Breakthroughs"" 1701 P.‎

‎Application des Sons Harmoniques. A la composition des Jeux d'Orgues. Par M. Sauveur.‎

‎Paris, Jean Boudot, 1704. 4to. Without wrappers. Extracted from ""Mémoires de l'Academie des Sciences. Année 1702"". Pp. 308-328 a. 2 large folded engraved plates. A few small brownspots. Wide-margined.‎

‎First appearance of a classic paper in the theory of sound (his second paper on Acoustics). Saveur had his first founding paper printed in 1701 ""Systeme général des Intervalles des Sons, & son Application à tous les Systèmes & à tous les Instrumens de Musique."" in which he developed the new subject ""acoustique"" (and coined the term), In the paper offered he was the first to use beasts to determine the frequency difference and he was thus able to calculate the absolute frequencies.""To determine absolute frequency, Sauveur used a pair of organ pipes a small half-tone apart in just intonation (frequency ratio 25:24). This interval is sufficiently small that the beats can be counted, for low pitches. Furthermore, the interval can be obtained accurately by tuning through thirds and perfect fifths (for example, by tuning up two major thirds and then down a fifth). As a results of experiments done with Deslander, and organ builder, Sauveur found that the frequency of an organ pipe five Paris feet long was between 100 and 102 cps. Sauveur claimed to have obtained consistent results from experiments done with other piopes. Newton made a rough check of Sauveurs eresults...""(DSB XII, p. 128).‎

‎Intérieurs anglais. Recueillis et mis en ordre par Hector St SAUVEUR.‎

‎ Paris, Massin, sans date (vers 1930). In-4, (4) pp. (titre et table des matières + 40 planches, en feuilles sous cartonnage imprimé de l'éditeur.‎

‎Cartonnage un peu usagé avec de petits défauts. ‎

‎Histoire de l'abbaye des religieuses de Saint-Sauveur de Marseille fondée au Ve siècle. D'après les documents inédits conservés aux archives départementales des Bouches-du-Rhône.‎

‎Imprimerie Vial Marseille 1863 Grand in-8 ( 250 X 160 mm ) de X-237 pages demi-toile chocolat à coins ( reliure de lépoque ). 3 planches hors texte. Édition originale tirée à 225 exemplaires, celui-ci N°14. Bel exemplaire, non rogné.‎

‎Histoire de l'abbaye des religieuses de Saint-Sauveur de Marseille fondée au Ve siècle. D'après les documents inédits conservés aux archives départementales des Bouches-du-Rhône.‎

‎Imprimerie Vial Marseille 1863 Grand in-8 ( 250 X 160 mm ) de X-237 pages demi-chagrin vert, dos à nerfs orné de fleurons dorés ( reliure de lépoque ). 3 planches hors texte. Édition originale tirée à 225 exemplaires, celui-ci N° 190. Bel exemplaire.‎