Text on Mongolian Orthography

Transliterated title: sayid metú bui. debisker-ún úsúg-úd cúm ami úgei.... A hand-written text on Mongolian orthography Ms is incomplete. Mongolian digital pagination. Russian paper 41x9, text block 17,5x7 cm, black ink, 39 lines on page. 3r-7v.