Title: Opisanīe o upotreblenīi fonareĭ s zerkalami, di︠e︡lai︠u︡shchikhsi︠a︡ v Sanktpeterburgi︠e︡ Imperatorskoĭ Akademīi Nauk u mekhanika Kulibina, samim im izobri︠e︡tennykh