Theo Gerardy

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Theodor "Theo" Gerardy (born August 3, 1908 in Euskirchen ; † June 19, 1986 in Hanover ) was a German geodesist , paper historian, watermark and incunabula researcher , co-founder of the International Working Group of Paper Historians (IPH) and co-founder of the Gauß Society.

Life

Gerardy took the land surveyor examination in 1930 and developed into one of the leading geodesists of his time. From 1954 he headed the largest land registry office in Lower Saxony in Hanover. He carried out numerous technical and administrative innovations and made great contributions to surveying and cadastral affairs as well as in the field of property appraisal. In 1972 he was appointed Chief Surveying Director and retired the following year. He also became known through important publications on the determination of the market value of properties . His book The Practice of Real Estate Valuation became a standard work in real estate.

The subject of his dissertation in 1952 was the Gaussian triangulation of the Kingdom of Hanover and the Prussian property tax measurements. In 1953 Gerardy began collecting material for the Gauss commemorative volume, which was published on the 100th anniversary of the scholar's death in 1955. Then he went to the order and cataloging of the estate of Carl Friedrich Gauß in the Göttingen University Library . This work led him to the study of watermarks.

For this historical auxiliary science, Gerardy made significant methodological contributions to the reproduction accuracy of watermarks, dealt with questions of technical terminology, with the photographic registration of watermarks and recommended the abrasion method as a detailed process for watermark documentation. Groundbreaking were his considerations on the computer-aided recording of watermark evidence, which he published in the last year of his life and which he could no longer fully expand personally. It proposes the exact recording of various sieve parameters (position of the sieve side, number of warp lines, determination of the number of ribs, dimensions of the watermark) in order to create a database for the machine evaluation and to be able to select suitable subsets. As early as 1965, in a critical discussion with Gerhard Piccard , he had submitted proposals for the organization of a watermark collection, which would subsequently also prove to be very helpful for the establishment of watermark databases.

With watermark studies, he participated in incunabula research with regard to the Missale speciale and the history of printing and the dating of the Mainz Catholicon .

Gerardy was one of the twelve founding members of the International Association of Paper Historians in 1959 . 1963–1976 he was vice-president of this organization and from 1967 to 1976 he was the editor of the newsletter IPH Information .

Publications

  • The Gaussian triangulation of the Kingdom of Hanover (1821–1844) and the Prussian property tax measurements (1868–1873). Diss. D. TH Hannover. Institute for Geodesy and Photogrammetry at the Technical University, Hanover 1952.
  • On the methodology of watermark research. In: Papiergeschichte 6 (1956), No. 2, pp. 14-20.
  • The Hollandia watermarks from FC Drewsen & Son 1822–1835. Attempt of a new catalog. In: Papiergeschichte 8 (1958), No. 1, pp. 1–8.
  • Collecting, organizing and cataloging watermarks. In: Papiergeschichte 9 (1959), No. 1, pp. 1–12.
  • About the service life of the paper forms and the paper . In: Papiergeschichte 11 (1961), No. 1, pp. 9-13.
  • The state of Gauss research. Gauss Society eV, Göttingen 1964.
  • Dating with the help of watermarks, exemplified by the total production of the Schaumburg paper mill in Arensburg from 1604–1650. (= Schaumburg studies. Booklet) Grimme, Bückeburg 1964.
  • Proof of identity in watermark dating. In: Archives for the history of the book industry. Vol. 9, 1968, Col. 733-778.
  • Galliziani mark, crown and tower as watermarks in large-format early prints. In: Gutenberg-Jahrbuch 1971, pp. 11-23.
  • Catalog of the WZ “Galliziani stamp”. In: IPH-Information 5 (1971), No. 3, pp. 66-73.
  • Watermarks in old papers. In: Dag-Ernst Petersen (Hrsg.): The old book as a task for science and research. Wolfenbüttel 1977, pp. 117-138.
  • The description of the paper found in manuscripts and prints. In: Les matériaux du livre manuscrit. Brill, Leiden 1980, 37-51.
  • The paper of the Seckelmeister invoices from Freiburg i.Ue. 1402-1465. SPH, Swiss paper historian, Schinznach-Bad 1980.
  • On the status of the Catholicon dating. In: IPH information. Vol. 17, 1983, No. 1, pp. 2-7.
  • On the methodology of dating early prints with the help of paper. In: Ars impressoria. Origin and development of the printing press. Saur, Munich 1986, pp. 47-64.
  • with other authors: Real Estate Valuation Practice: The Encyclopedia of Appraisal. Loose-leaf collection. ISBN 978-3789218002 .

literature

  • Henk Voorn: Dr. Theo Gerardy (1908-1986). In: IPH-Information 20 (1986), No. 3/4. Pp. 97-98.
  • Henk Voorn; Severin Corsten: Gerardy, Theo. In: Lexicon of the entire book industry. Vol. 3, 1991, p. 138

estate

Web links

Individual evidence

  1. ^ Theo Gerardy: Practice of property valuation . Verlag Moderne Industrie, Munich 1971; 2nd edition 1975; 3., rework. u. exp. 1980 edition.
  2. ^ CF Gauss and the land survey in Lower Saxony. Edited by the Lower Saxony Surveying and Cadastre Administration. Hanover 1955
  3. ^ Christian Ludwig Gerling to Carl Friedrich Gauss. 60 previously unpublished letters. Edited by Theo Gerardy. Vandenhoeck & Ruprecht, Göttingen 1964.
  4. ↑ Theo Gerardy: With what accuracy can watermarks be reproduced? In: Papiergeschichte 12 (1962), No. 3, pp. 25–31.
  5. ^ Theo Gerardy: Terminology of the scoop device . In: IPH-Information 2 (1963), No. 3; Pp. 4-5.
  6. ^ Theo Gerardy: The photographic registration of watermarks. In: Papiergeschichte 16 (1966) No. 5/6, pp. 22-25.
  7. ^ Theo Gerardy: Abrasion - an excellent method for depicting watermarks. In: IPH-Information 15 (1981) No. 2, pp. 48-51.
  8. ^ Theo Gerardy: The development of a watermark collection with the help of electronic data processing. In: Das Papier 40 (1986), No. 2, pp. 49-55.
  9. ^ Gerhard Piccard: The watermark collection II. The paper history collection and its order. In: Papiergeschichte 15 (1965), No. 1/2, pp. 14-21.
  10. ^ Theo Gerardy: The watermark collection I. The structure of a watermark collection. In: Papiergeschichte 15 (1965), No. 1/2, pp. 7-14.
  11. ^ Theo Gerardy: Principles of order of a watermark collection. In: IPH-Information 8 (1974), No. 1, pp. 5-20.
  12. ^ Theodor Gerardy: On the dating of the Missale speciale printed with Gutenberg's small psaltery type. In: Archives for the history of books , Vol. 5, 1964, Col. 399-415.
  13. ↑ Theo Gerardy: When was the Catholicon really printed with the final font from 1460 (GW 3182)? In: Gutenberg-Jahrbuch 1973, pp. 105–126.
  14. ^ Theo Gerardy: On the state of the Catholicon dating. In: IPH-Information 17 (1983), No. 1, pp. 2-7.
  15. ↑ Henk Voorn: The first twelve. On the early history of the IPH. In: paper history (s) . Harrassowitz, Wiesbaden 1996, pp. 11-16.
  16. ^ Albert J. Elen: The watermark collection Dr. Ing.Theo Gerardy. In: IPH-Information 22 (1988), No. 4, pp. 160-164.
personal data
SURNAME Gerardy, Theo
ALTERNATIVE NAMES Gerardy, Theodor
BRIEF DESCRIPTION German geodesist and paper historian
DATE OF BIRTH August 3, 1908
PLACE OF BIRTH Euskirchen
DATE OF DEATH June 19, 1986
Place of death Hanover