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.
British physicist Robert Hooke was credited as the first person to invent one of these devices. Between 1664 and 1685, Hooke conducted numerous experiments with these devices. The first telephone-like device, an acoustic string phone, is credited to him in 1667.