In historical Chinese phonology, these Modern Chinese pronunciations differ considerably with the original 3rd-7th century transcriptions from a transitional period between Archaic or Old Chinese and Ancient or Middle Chinese. The table below contrasts Modern pronunciations (in Pinyin) with differing reconstructions of Early Middle Chinese (Edwin G. Pulleyblank 1991), "Archaic" Chinese (Bernhard Karlgren 1957), and Middle Chinese (William H. Baxter 1992). Note that Karlgren's "Archaic" is equivalent with "Middle" Chinese, and his "yod" palatal approximant "" (which some browsers cannot display) is replaced with the customary "j".