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.
The tampon has been in use as a medical device since the 18th century, when antiseptic cotton tampons treated with salicylates were used to stop bleeding from bullet wounds. Drs. Earle Haas patented the first modern tampon, Tampax, with the tube-within-a-tube applicator.