1 Calories Burned For Walking: 4.6 km/h (13 minutes per km). 2  Calories Burned For Walking: 4 km/h (15 minutes per km). 3  Calories Burned For Walking: 3.15 km/h (19 minutes per km).
The first true hypodermic syringe was created by Alexander Wood in 1853. He modified a regular syringe, which at that time was used for treating birthmarks, by adding a needle. He then used this new device for introducing morphine into the skin of patients who suffered from sleeping disorders.
Ether was the first known surgical anesthesia. Overview. The history of surgical anesthesia is a relatively short one--the first known anesthetic, diethyl ether, was used in the mid-19th century. It was sometimes called ethyl ether, or simply ether.