Obsolete Russian units of measurement Peter the Great replace it with the Hindu-Arabic numeral system. The basic unit is the Russian cubit, called the "arshin", which has been in use since the 16th century. It was standardized by Peter the Great in the 18th century to measure exactly twenty-eight English inches (). Thus, 80 vershoks = 20 piads = 5 arshins = 140 English inches (). A "piad" (, “palm”, “five”) or "chetvert" (, “quarter”) is a hand span, the distance between ends of the spread thumb and index finger. Alternative units: As in many ancient systems of measurement the Russian distinguishes between dry and
The Tip of the Zoidberg Zoidberg returns to announce his discovery to the crew just as the Professor begins transforming into a yeti. Zoidberg forces him to swallow the yeti gland, successfully curing him. As the crew goes to a tanning salon to celebrate, Zoidberg laments giving away his coupon. A grateful Farnsworth goes back and offers to treat Zoidberg to a free session, and they both depart as friends. The Tip of the Zoidberg "The Tip of the Zoidberg" is the eighteenth episode of the sixth season of the animated sitcom "Futurama". It aired on Comedy Central in the United States on August 18,