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NkówáDollond Heliometer 1790.jpg
English: Heliometer lens, Dollond, London, around 1790. 16 x 6.8 cm (University Observatory Vienna). The lens was placed in front of a refractor of 6.7 cm aperture.
Deutsch: Heliometerobjektiv von Dollond, London, um 1790. Maße: 16 x 6.8 cm. Die Linse wurde mit einem 6.7cm-Refraktor von Dollond verwendet. (Universitätssternwarte Wien)
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í-kpó-áhà – Ị ga-enyerịrị ugo kwesịrị ekwesị, nye njikọ na ikikere ahụ, ma gosikwa ma emere mgbanwe. Ị nwere ike ime ya n'ụzọ ezi uche ọ bụla, mana ọ bụghị n'ụzọ ọ bụla na-egosi na onye nyere ikikere kwadoro gị maọbụ ojiji gị.
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{{Information |Description ={{en|1=Heliometer lens, Dollond, London, around 1790. 16 x 6.8 cm (University Observatory Vienna). The lens was placed in front of a refractor of 6.7 cm aperture.}} {{de|1=Heliometerobjektiv von Dollond, London, um 1790....
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