. Some apostles of physiology : being an account of their lives and labours, labours that have contributed to the advancement of the healing art as well as to the prevention of disease. thoughtlessly led on with attempts to explain all kinds of nervous diseases, assciatica, tetanus, and epilepsy, began to believe that no cure was impossible ; and it wasconsidered certain that no one in a trance could in future be buried alive, provided onlythat he were galvanized. ( 111 ) We have not space to trace the story of Animal Electricity, but,leading up to its investigation, we have the discovery of O
. Some apostles of physiology : being an account of their lives and labours, labours that have contributed to the advancement of the healing art as well as to the prevention of disease. thoughtlessly led on with attempts to explain all kinds of nervous diseases, assciatica, tetanus, and epilepsy, began to believe that no cure was impossible ; and it wasconsidered certain that no one in a trance could in future be buried alive, provided onlythat he were galvanized. ( 111 ) We have not space to trace the story of Animal Electricity, but,leading up to its investigation, we have the discovery of Oersted ofthe deflection of a needle, by a galvanic current, Amperes astaticneedle (1820), and Nobilis invention of a galvanometer of greatdelicacv. LEOPOLDO NOBILI (1784-1834) was for a time Professor ofPhysics in Florence. His most valuable contribution in thematter that now interests us is the astatic combination of twoneedles, by which the sensibility of the galvanometer is increased. Heinvented his galvanometer in 1825. This opened the way to a morecareful study of the frog current. He communicated his inventionto the Accademia di Scienze, Lettere ed Arti di Modena. He also. LEOPOLDO XOBILI. S. busied himself with vegetable physiology, and studied the move-ments of protoplasm in Chara, Nor must we forget Alex. (1769-1859), C. Matteucci (1811-1868), and S. Marianini(1790-1866). MATTEUCCI, in his Traite des Phenomenes Electro-physiologiques des Animaux gives an excellent short historical accountof this subject, and recalls the statement that Swammerdam (BibliaNaturae, II., p. 849) made an experiment, in 1668, before the GrandDuke of Tuscany, showing that a muscle contracted when a copperwire was touched by a silver one. This experiment is shown inthe figure already given under Swammerdam (p. 34). This statementis incorrect, as Du Bois has shown (Elect. I., p. 43). The old ( 112 ) experiment of touching the tongue with two pieces of metal, andthereby exci
Size: 1872px × 1335px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectphysiol, bookyear1902
