@_sotanaka 御指摘被下忝奉存候, you're absolutely right! The form oshiyuru ヲシユル is actually even used towards the end of the preface, as I noticed only later. Also note no ノ as a misprint for i イ here in "daigaku". ^^ Link to page: https://t.co/sO0MBOBLOB https://t.co/sw5bzXwSYi

The pics in the two preceding tweets are from the NDL's scan of the book which you can find here: https://t.co/livyVM7iIE 3/