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
Tip of the tongue the tongue", "on the tip/point/head of the tongue", "on the top of the tongue", "on the front of the tongue", "sparkling at the end of the tongue", and "in the mouth and throat". Notably, the languages studied that did not have an equivalent idiom for the tip of the tongue were American Sign Language, Amharic, Icelandic, Indonesian, Kalenjin, and Kiswahili. However, tip of the finger experiences are reported by signers. The causes of TOTs are largely unknown but numerous explanations have been offered. These explanations mainly fall within the realms of two overarching viewpoints: the direct-access view and the inferential