This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Frog battery from Bird. Frog battery consisting of series of halfthighs of frogs Golding Bird google co uk id CbcLAAAAYAAJ pg onepage true Elements of Natural Philosophy edition Golding Bird Spinningspark en PDold Original upload log en Wdwd CommonsHelper en FrogbatteryfromBird Spinningspark bytes no Frog battery consisting