By 1760 he was designated “l’Abate Spallanzani” and was generally known as such thereafter. The next dissertation reported Spallanzani’s recent findings on artificial fecundation. His other great zoological collection, now at the Institute of Zoology, University of Pavia, is described by C. Jucci in L’Istituto di Zoologia “Lazzaro Spallanzani...” (Pavia, 1939). . His younger brother Niccolò. He later became a priest for the Roman Catholic Church and that offered him protection from the Italian Inquisition. "Lazzaro Spallanzani To suggest that he should have gone further and discovered the germ theory of disease is to forget that 100 years later Pasteur had to repeat Spallanzani’s work before he finally laid to rest the specter of spontaneous generation; and only then could he convince a reluctant medical profession and skeptical fellow scientists that man might be brought low and killed by parasites of almost incredible minuteness. 1802), but was rebutted in Lettera di Giovanni Martinenghi... (Pavia. In his letter of thanks to Bonnet, Spallanzani stated that of all the natural history museums he visited in Switzerland, only Zurich possessed one where the collections and curator were not amateurish. His first published biological work was in 1767. His intention to write a major work on the natural history of the sea did not materialize; but in open letters to Bonnet he recorded observations on “diverse produzioni marine,” from sponges, corals, and sea-mussels, to a freshwater fountain gurgling through the salt water of the Gulf of Spezia. Lazzaro Spallanzani, (born Jan. 12, 1729, Modena, Duchy of Modena—died 1799, Pavia, Cisalpine Republic), Italian physiologist who made important contributions to the … Spallanzani, Lazzaro, 1729-1799. . Secondary Literature. In more recent times the overspecialized have ignored the rare scope and stature of his accomplishments and have disparaged his prodigious output as dilettantism. Even after lung removal, snails absorbed oxygen and gave up carbon dioxide. Opuscoli di fisica, animale e vegetabile. 1833–1841). 1780), of which a second ed. [8] In 1777, he gave the name Tardigrada (from Latin meaning "slow-moving") for the phylum of animal group comprising one of the most durable extremophiles still to this day. Excising the heart did not lessen the shock until the circulation began to fail. Leeuwenhoek, Antoni van 1757) and Propositiones physico-mathematicae... (Reggio Emilia. In his 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. Spallanzani greatly extended Réaumur’s experiments. To his astonishment, both bats flew completely normally. . The remaining three tracts were of lesser significance. Despite hazardous mountain passes, floods and torrents, brigands and cutthroats, detours were made to inspect mines and geological structures, and more specimens were collected. Retrieved February 24, 2021 from Encyclopedia.com: https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/spallanzani-lazzaro. A judicial investigation speedily cleared his honour to the satisfaction of some of his accusers. Complete Dictionary of Scientific Biography. were republished as Oeuvres de, M. I’Abbé Spallanzani. In: Spallanzani, Lazzaro. He also studied the effects of growth (in the chick embryo and tadpole) upon circulatory mechanisms; the influence of gravity and the consequences of wounds on different parts of the vascular system; and changes in the languid or failing circulation in dying animals. He studied regeneration in a wide range of animals and concluded that lower animals have greater regenerative power than the higher, young individuals have a greater capacity for regeneration than the adults, and generally it is only superficial parts that can regenerate. ." Through his research on biogenesis, he sought to refute the preformationism theory that … [2] At the time, the microscope was already available to researchers, and using it, the proponents of the theory, Pierre Louis Moreau de Maupertuis, Buffon and John Needham, came to the conclusion that there is a life-generating force inherent to certain kinds of inorganic matter that causes living microbes to create themselves if given sufficient time. Among his few relaxations were fishing and hunting, and he was expert at chess. But the notion was reapplied to lesser forms of life after the pioneer microscopist Leeuwenhoek described the little animals teeming and cavorting in his infusions (1674); he and several of his successors supposed that these animals were of atmospheric origin. He went to within five feet of the lava pouring from the rent mountainside and accurately measured its flow rate. Spallanzani informed Count Giuseppe Wilzeck (successor to Firmian) that the humidity in Pavia so aggravated his gout that he must relinquish his teaching post. 3 vols. (London, 1784, 1786). This work was followed by another volume, of anonymous authorship, disparaging Scopoli’s earlier text on natural history. Encyclopedia.com. He adduced abundant evidence that, notwithstanding the absence of true copulation in these amphibians, actual contact between eggs and seminal fluid is essential to fecundation. But then he assumed that it was the liquid part which could induce fertilisation. He was member of Prussian Academy of Sciences, Royal Swedish Academy of Sciences, and Göttingen Academy of Sciences and Humanities. Spallanzani ‹-z-›, Lazzaro. Description Although his experimentation was exact, and he did prove that some organisms can live in a vacuum for many days (anaerobiosis), his theory was not comprehensive enough. (Bern, 1795–1797); Des Abtes Spallanzani Reisen in beyde Sicilien und in Gegenden der Appenninen, 5 vols. These two short monographs, along with Dissertazioni due (1765) and Prodromo (1768), were republished in a German trans. Describing Buffon’s theory as “completely destroyed,” he urged him to repeat experiments “with better microscopes, forgetting his beloved organic molecules, and imposing the rule on himself to receive as truth only the images transmitted by the senses, without adding the corrections of his imagination.”. Haller’s microscopic observations of blood movements in his Deux mémoires sur le mouvement du sang (1756) had been made by refracted light on medium-sized vessels in the isolated mesentery of the frog. In that year, Napoleon’s armies were overrunning Lombardy. ." In Prolusio (Modena, 1770), his University of Pavia inaugural address, given in Latin, Spallanzani again disputed Needham’s support of spontaneous génération; and six years later the doctrine received further rebuttals in the Opuscoli, I, pp. (London, 1798). While he was travelling in the Balkans and to Constantinople, his integrity in the management of the museum was called in question (he was accused of the theft of specimens from the University's collection to add to his own cabinet of curiosities), with letters written across Europe to damage Spallanzani's reputation. In unraveling the secrets of nature, every aspect of which intrigued or inspired him, he maimed and slaughtered countless animals. vii-xxvi: P. Pavesi, “L’Abate Spallanzani a Pavia,” in Società Italiana di scienze naturali di Milano. The Italian naturalist Lazzaro Spallanzani (1729-1799) was one of the founders of modern experimental biology. Spallanzani is also discussed in Joseph Needham, A History of Embryology (1934; 2d ed. Italian priest, physiologist and natural scientist, born January 12, 1729, Scandiano, in the province Reggio-Emilia; died February 11, 1799, Pavia, Cisalpine Republic. Two months later, three healthy whelps resembling both parents were born—an event that provoked Spallanzani to aver. Since he had no private income, the financial assistance (and moral protection) of the church facilitated his investigations of natural phenomena. However, the date of retrieval is often important. Spallanzani, English School,” in A History of Medicine (New York, 1946), E. B. Krumbhaar, trans. He administered food samples, generally in perforated metallic tubes or spherules, to an astonishing variety of animals. Scopoli’s libelous letter of 2 February 1787. conveying the accusations about Spallanzani’s museum curatorship, appears in P. Leonardi. He also successfully transplanted the head of one snail onto the body of another, investigated the circulation of the blood, did an important series of experiments on digestion, and studied the role of semen in reproduction. The Historical Museum of that university exhibits relics of Spallanzani, besides a small MS collection. Spallanzani concluded that the vegetative force was imaginary.
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