Galvani experimenting on frogs
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Galvani experimenting on frogs
Luigi Galvani demonstrating the contraction of the muscles in the leg of a frog.He first observed the twitching and contraction of a frogs leg when two different metals were placed on its spinal cord and the muscles of the leg. He went on to use a bimetallic arc consisting of copper and zinc to carry out further experiments. He ascribed the effect to " animal electricity" whereas Volta attributed the contraction to the electrochemical behaviour of two dissimilar metals in a bimetallic arc which were in contact with electrolytes in the frogs tissue
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6309845
© SHEILA TERRY/SCIENCE PHOTO LIBRARY
18th Century Copper Electrochemical Frog Frogs Spinal Column Volta Zinc Animal Electricity Galvani Galvanism Luigi Galvani
EDITORS COMMENTS
The captivating print captures the groundbreaking moment when Luigi Galvani, an eminent 18th-century scientist, conducted his pioneering experiments on frogs. In this remarkable image, Galvani can be seen delicately placing two different metals onto the spinal cord and muscles of a frog's leg. Little did he know that this simple act would lead to one of the most significant discoveries in the field of physiology. Galvani's keen observation revealed something extraordinary – as soon as the metals made contact with the frog's tissues, its leg twitched and contracted. Fascinated by this phenomenon, Galvani continued his investigations using a bimetallic arc composed of copper and zinc. Through these subsequent experiments, he delved deeper into understanding what he called "animal electricity". However, it was Alessandro Volta who later proposed an alternative explanation for these muscular contractions. He attributed them to the electrochemical behavior occurring between two dissimilar metals within a bimetallic arc immersed in electrolytes present in the frog's tissue. This iconic photograph not only immortalizes Galvani's pivotal work but also symbolizes a turning point in scientific history. It serves as a reminder of how curiosity-driven research can unravel mysteries hidden within nature itself. The fusion of artistry and science captured by Science Photo Library allows us to appreciate both the historical significance and aesthetic beauty embedded within this snapshot from centuries ago.
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