Lazzaro Spallanzani :: essays research papers

Lazzaro Spallanzani     Lazzaro Spallanzai, was the Italian physiologist who was one of the founders of experimental biology. natural in Scandiano, a small town in the providence of genus Emilia on Jan. 12, 1729 , Spallanzani was among the many dedicated philosophersof the eighteeth century (Lazzaro...1). His main scientific interests were biologic and was a master at mircoscopy,but he besides looked into problems of physics,chemistry, geology, and meteorology, and volcanology (Gillispie,1).      afterward attending a local school, Spallazani went at afe fifteen to a Jesuitic seminary in Reggio Emilia where he dominated in rhetoric, philosophy, and languages. He leftover Reggio Emilia in 1749 to study jurisprudence at the ancient University of Bologna, where he expanded is education in mathematics, chemistry, natural history, and aquired a knowledge of French (Asimov,1). For three years he worked toward his docterine in law. In 1753 or 17 54 he became a doctor of philosophy. Then, he recieved instructions in metaphysics and theology and took pocket-sized orders. Within a few years he became a non-Christian priest and added himself to two congregations in Modena (Gillispie,2).     Spallanzani, in hundreds of experiments tested various rituals for rendering infusions for good barren and finally found that they remained free of microorganisms when put into flasks that were sealed and the contents boiled for one hour (Lazzaro...1).The entrance of air into the flask with a slight crack in its neck was                                                        Patel 2followed infusoria. He reported no spontaneous gene dimensionn in strongly change infusions protected from aerial contami nation. In 1765, after cutting up thousands of earthworms and exploiting the expertness of the aquatic salamander to regrow its tail, he resolved to investigate productive phenomena in animals ans plants(Gillispie,3). He proved this by cuting theworms the area that affect the segmental regenerative response. Amputation of the tailwas followed by vascularization of the transparent growing stump. He also established the general law that in convincible species inverse ratio obtains between the regenerativecapacity and age of the animal. Lazzaro launched countless experiments relating to infusion animalcules and "spermatic worms," with result that in short made chimera of thevegetatice force and undermined the docterine of organic molecules but these ideasdemanded more management so they were postponed (Asimove,2). He also found that complex infusoriaare more susceptible to heat and cold than the "infinitely minute" germ of lower class,whose relational resistance h e ascribed to their eggs. In 1777 he publicly demonstrated the wide force exerted by the gizzards of fowls and ducks in