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Web 533x800px
18.8cm x 28.22cm@72dpi
HQ 2667x4000px
22.58cm x 33.87cm@300dpi
Heliograph
Heliograph, glass bowl, an instrument that measures the daily sunlight
Ivansmuk
132 photos
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© Ivansmuk |
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ancient
antique
device
drawing
engineering
engraved
engraving
etching
guidepost
headland
hedges
heliograph
historic
historical
incrust
instrument
interline
invention
lamp
light
mail
mark
object
old
outdoor
overlay
perforation
plot
radar
retro
signal
sun
sunrise
sunset
technical
technological
technology
transfer
vintage
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