2 volumes, 1st French edition
Nouvelles recherches sur les decouvertes microscopiques, et la generation des corps organises
by Lazaro Spallanzani
Second part, with separate title page:
Nouvelles recherches physiques et metaphysiques sur la nature et la religion, avec une nouvelle theorie de la terre, et une mesure de la hauteur des Alpes
par M. de Needham.
NEW RESEARCH ON MICROSCOPIC DISCOVERIES, AND THE GENERATION OF ORGANIZED BODIES. WORK TRANSLATED FROM THE ITALIAN OF MR. ABBOT SPALANZANI… BY MR. ABBOT REGLEY… WITH NOTES, PHYSICAL & METAPHYSICAL RESEARCH ON NATURE & RELIGION, & A NEW THEORY OF THE EARTH, BY MR. DE NEEDHAM ...
The second part, with separate title page, has title: New physical and metaphysical research on nature and religion, with a new theory of the earth, and a measure of the height of the Alps, by M. de Needham
London & Paris: Chez Lacombe, 1749,
with notes by Needham, in two octavo volumes (5 1/4 by 7 3/4")
Bound in full uniform calf, gilt-tooled spines, illustrated with 9 engraved plates
Very good condition except missing frontis in part 1)
Bookplates of for William Constable of Burton Constable Hall in East Yorkshire on the pastedowns of both volumes.
Text in French

Lazzaro Spallanzani (1729 – 1799) was an Italian Catholic priest (for which he was nicknamed Abbe Spallanzani), biologist and physiologist who made important contributions to the experimental study of bodily functions, animal reproduction, and animal echolocation.
His research on biogenesis paved the way for the downfall of the theory of spontaneous generation, a prevailing idea at the time that organisms develop from inanimate matters, though the final death blow to the idea was dealt by French scientist Louis Pasteur a century later.
His most important works were summed up in his book Experiencias Para Servir a La Historia de La Generación De Animales y Plantas (Experiences to Serve to the History of the Generation of Animals and Plants), published in 1786.
Among his contributions were experimental demonstrations of fertilisation between ova and spermatozoa, and in vitro fertilisation.
"Among the many dedicated natural philosophers of the eighteenth century, Spallanzani stands preeminent for applying bold and imaginative experimental methods to an extraordinary range of hypotheses and phenomena. His main scientific interest were biological and he acquired a mastery of microscopy; but he probed also into problems of physics, chemistry, geology, and meteorology, and pioneered in volcanology"



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