Online Encyclopedia

Search over 40,000 articles from the original, classic Encyclopedia Britannica, 11th Edition.

MARCELLO MALPIGHI (1628-1694)

Online Encyclopedia
Originally appearing in Volume V17, Page 497 of the 1911 Encyclopedia Britannica.
Spread the word: del.icio.us del.icio.us it!

See also:

MARCELLO See also:MALPIGHI (1628-1694)  , See also:Italian physiologist, was See also:born at Crevalcuore near See also:Bologna, on the loth of See also:March 1628 . At the See also:age of seventeen he began the study of See also:philosophy; it appears that he was also in the See also:habit of amusing himself with the See also:microscope . In 1649 he started to study See also:medicine; after four years at Bologna he graduated there as See also:doctor . He at once applied to be admitted to lecture in the university, but it was not till after three years (1656) that his See also:request was granted . A few months later he was appointed to the See also:chair of theoretical medicine at See also:Pisa, where he enjoyed the friendship and countenance of G . A . See also:Borelli . At the end of four years he See also:left Pisa, on the ground of See also:ill-See also:health, and returned to Bologna . A See also:call to be See also:professor primarius at See also:Messina (procured for him through Borelli, who had in the meantime become professor there) induced him to leave Bologna in 1662 . His engagement at Messina was for a See also:term of four years, at an See also:annual See also:stipend of 1000 scudi . An See also:attempt was made to retain him at Messina beyond that See also:period, but his services were secured for his native university, and he spent the next twenty-five years there . In 1691, being then in his sixty-See also:fourth See also:year, and in failing health, he removed to See also:Rome to become private physician to See also:Pope See also:Innocent XII., and he died there of See also:apoplexy three years later, on the 3oth of See also:November 1694 .

Shortly before his See also:

death, he See also:drew up a See also:long See also:account of his academical and scientific labours, See also:correspondence and controversies, and committed it to the See also:charge of the Royal Society of See also:London, a See also:body with which he had been in intimate relations for more than twenty years . The auto-See also:biography, along with some other See also:posthumous writings, was published in London in 1696, at the cost of the Society . The See also:personal details left by See also:Malpighi are few and dry . His narrative is mainly occupied with a See also:summary of his scientific contributions and an account of his relations to contemporary anatomists, and is entirely without See also:graces of See also:style or elements of See also:ordinary human See also:interest . Malpighi was one of the first to apply the microscope to the study of See also:animal and See also:vegetable structure; and his discoveries were so important that he may be considered to be the founder of microscopic See also:anatomy . It was his practice to open animals alive, and some of his most striking discoveries were made in those circumstances . Although See also:Harvey had correctly inferred the existence of the capillary circulation, he had never seen it; it was reserved for Malpighi in 1661 (four years after Harvey's death) to see for the first See also:time the marvellous spectacle of the See also:blood See also:coursing through a network of small tubes on the See also:surface of the See also:lung and of the distended urinary See also:bladder of the See also:frog . We are enabled to measure the difficulties of microscopic observation at the time by the fact that it took Malpighi four years longer to reach a clear understanding of the corpuscles in the frog's blood, although they are the parts of the blood by which its See also:movement in the capillaries is made visible . His See also:discovery of the capillary circulation was given to the See also:world in the See also:form of two letters De Pulmonibus, addressed to Borelli, published at Bologna in 1661 and reprinted at See also:Leiden and other places in the years following; these letters contained also the first account of the vesicular structure of the human lung, and they made a theory of respiration for the first time possible . The achievement that comes next both in importance and in See also:order of time was a demonstration of the See also:plan of structure of secreting glands; against the current See also:opinion (Zevived by F . Ruysch See also:forty years later) that the glandular structure was essentially that of a closed vascular coil from which the secretion exuded, he maintained that the secretion was formed in terminal acini See also:standing in open communication with the ducts . The name of Malpighi is still associated with his discovery of the soft or mucous See also:character of the See also:lower stratum of the epidermis, of the vascular coils in the cortex of the See also:kidney, and of the follicular bodies in the See also:spleen .

He was the first to attempt the finer anatomy of the See also:

brain, and his descriptions of the See also:distribution of See also:grey See also:matter and of the fibre-tracts in the See also:cord, with their extensions to the cerebrum and cerebellum, are distinguished by accuracy; but his microscopic study of the grey matter conducted him to the opinion that it was of glandular structure and that it secreted the " vital See also:spirits." At an See also:early period he applied himself to vegetable See also:histology as an introduction to the more difficult study of the animal tissues, and he was acquainted with the See also:spiral vessels of See also:plants in 1662 . It was not till 1671 that he wrote his Anatome plantarum and sent it to the Royal Society, who published it in the following year . An See also:English See also:work under a similar See also:title (Anatomy of Vegetables) had been published in London a few months earlier, by See also:Nehemiah See also:Grew; so that Malpighi's priority as a vegetable histologist is not so incontestable as it is in animal histology . The Anatome plantarum contained an appendix, Observations de ovo incubato, which gave an account (with See also:good plates) of the development of the chick (especially of the later stages) in many points more See also:complete than that of Harvey, although the observations were needlessly lessened in value by being joined to the metaphysical notion of ` praedelineation " in the undeveloped ovum . He also wrote Epistolae anatomicae Marc . Malpighii et See also:Car . Fracassati (See also:Amsterdam, 1662) (on the See also:tongue, brain, skin, omentum, &c.) ; De viscerum structura: exercitatio anatomica (London, 1669) ; De structura glandularum conglobatarum (London, 1689) ; See also:Opera posthuma, et vita a seipso scripta (London, 1697; another edition, with See also:preface and additions, was published at Amsterdam in 1700.) An edition containing all his See also:works except the last two was published in London in 1687, in 2 vols. See also:folio, with portrait and plates .

End of Article: MARCELLO MALPIGHI (1628-1694)
[back]
BARON PIERRE VICTOR MALOUET (1740-1814)
[next]
MALPLAQUET

Additional information and Comments

There are no comments yet for this article.
» Add information or comments to this article.
Please link directly to this article:
Highlight the code below, right click and select "copy." Paste it into a website, email, or other HTML document.