VOORHELM, George.

Traité sur la Jacinte. Contenant la maniere de la cultiver suivant l'expérience qui en a été faite.

Three engraved plates (two folding, one with a short clean tear). [3]-13 pp., [3], 123 pp. 8vo, cont. vellum over boards. Haarlem: I. & J. Enschedé, 1752. First edition. "George (or Joris) Voorhelm belonged to the firm of Voorhelm & Van Zompel (later Voorhelm & Schneevoogt), who maintained a famous nursery at Haarlem. His great-grandfather, Dirk Jansz Voorhelm, had come from Vorhelm in Westphalia in the time of the Tulipomania (1636-37) and become a bulb-grower. His grandfather, Pieter Voorhelm, is said to have developed the double hyacinth, of which the bulbs sometimes sold for tall prices. George Voorhelm published his Traité sur la Jacinte at a time when nurserymen were generally opposed to the dissemination of their secrets, but in this manner he considerably increased the business of his firm and gained a measure of fame for himself... "Of particular significance for the study of hyacinths is the inclusion of a list of 246 named varieties having double flowers, a mutation then well known in gardens for the previous two centuries. Currently, fewer than a half-dozen cultivars are grown in Holland by a few specialists. The Voorhelm list appears at pp. 51-59 of the 1752 edition. The frontispiece and the plate at p.120 show three double varieties, unidentified."­Hunt 545. Lacking the half-title but a fine copy. There were two later edition published in Haarlem and German and English translations. Pritzel 9852. Stafleu & Cowan 16,352.

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