Egyptians use basic machines such as ramps and lever. Many temples the Egyptians built still stand today, also the Egyptian building or monuments are one of the biggest in world. Egyptians started using sail boats around 2400 BCE, to catch wind and push a vessel. Egyptians had a lot of experience building different ships. Egyptian knowledge for glass work is advanced. The earliest known glass beads for Egypt was made during the New Kingdom in 1500BC. They were made by winding molten glass around a metal bar and it was very valuable in trading commodity. Egyptian medicine was not that effective because 72% of 260 medical prescription were pretty much useless. According to Micheal D. Parkins, sewage pharmacology started in Ancient Egypt and continued through the middle ages. Egyptians applied cow dung to wounds, ear piercing tattooing and chronic ear infections. Some medicine was made of fly specks, lizard blood swine teeth and others. Egyptian funerals were complex and expensive. They include monuments, prayers and rituals in honor for the deceased. The poor couldn't afford expensive tombs, so they buried the deceased in shallow graves in sand.