A correlation is a single numerical value that is used to describe the relationship between two variables. All correlations have strength and direction. When two variables have a positive correlation, that means the two variables move in the same direction. The closer a positive correlation is to 1, the stronger it is.
William Gilbert discovered electricity, not Nikola Tesla. Nikola Tesla invented things. not discovered electricity. Again, William Gilbert discovered it and named it. He did this in the 1600s. It wasn't Nikola Tesla.
Galvani's great Italian contemporary Alessandro Volta began working on animal electricity in 1792 and came out in direct opposition to Galvani's theory of an animal electrical fluid. It was then that the famous controversy between the two began.hen Galvani died, prospects for the survival of his theory were very uncertain. Nevertheless, support for the concept of animal electricity survived into the nineteenth century and ultimately led in the 1840âs to the basic work of Emil du Bois-Reymond.