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Frog's-leg galvanoscope. The frog galvanoscope was a sensitive electrical instrument used to detect voltage [1] in the late 18th and 19th centuries. It consists of a skinned frog's leg with electrical connections to a nerve. The instrument was invented by Luigi Galvani and improved by Carlo Matteucci.
An early D'Arsonval galvanometer showing magnet and rotating coil. A galvanometer is an electromechanical measuring instrument for electric current.Early galvanometers were uncalibrated, but improved versions, called ammeters, were calibrated and could measure the flow of current more precisely.
Matteucci's frog battery, 1845 (top left); Aldini's frog battery, 1818 (bottom); apparatus for controlled exposure of gases to frog battery (top right). A frog battery is an electrochemical battery consisting of a number of dead frogs (or sometimes live ones), which form the cells of the battery connected in a series arrangement.
The Westminster Kennel Club Dog Show is taking place this week in New York, leading up to one of the pups competing being named Best in Show. Dogs compete in seven groups (Hound, Toy, Non-Sporting ...
During this time, male-female pairs are seen in small pools left behind after water levels drop. The male makes a nest using his saliva and the female deposits around 1,200 eggs for fertilisation . Spawn hatch seven days later and mothers keep depositing eggs periodically throughout the breeding season, making them fractional spawners. [ 53 ]
A 68-year-old woman was bitten by a javelina as it fought with her dogs in southern Arizona, wildlife officials said. The javelina bit the woman from Pearce on the shin, the Arizona Game & Fish ...
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For some people it's hard enough to just sit comfortable with one leg over the other -- and men especially. After Imgur user SickOfFeelingNumb posted the photo , hundreds of people began commenting.