Using coins for scale is discouraged as it will require people unfamiliar with them to look up the dimensions or guess, both of which defeat the purpose of the object in the first place. Coins can also reinforce a geographical bias, and some coins' designs are copyrighted.
Ideally, a photograph should include a ruler with the subject (example) or an added scale marking.
SI ("metric") units are the most commonly used worldwide (see meter and centimeter).
English: Reconstruction of a nyctograph, a device invented by Lewis Carroll in 1891 for transcribing thoughts and dreams during the night without having to leave bed and light a lamp. Cut by Noah Slater from an envelope to Carroll's original specification, with five euro cent coin for size comparison.
para ibahagi – para kopyahin, ipamahagi, at i-transmit ang akda
para i-remix – para i-adapt ang akda
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atribusyon – Dapat magbigay ka ng isang maayos na pag-credit, ibigay ang link sa lisensiya, at tukuyin kung may mga pagbabagong ginawa. Magagawa mo ito sa isang risonableng paraan, pero hindi sa paraan na para bang ineendorso ka o ng paggamit mo ng naglisensiya sa'yo.
https://creativecommons.org/licenses/by/3.0CC BY 3.0 Creative Commons Attribution 3.0 truetrue
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{{Information |Description ={{en|1=Reconstruction of a nyctograph, a device invented by Lewis Carroll in 1891 for transcribing thoughts and dreams during the night without having to leave bed and light a lamp. Cut b
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