Bottle-gnomon Gnomon-bouteille

Two bottles of water (1.5L) One broomstick. Two paperbord (for the top and for the bottom of the 1m gnomon)
One band of measurement (double scale centimeters-degrees)
Measurement: length 90.8cm; angle 42°15'

Gnomons and printable rulers, section technology, on these sites:

Gnomons et règles imprimables, rubrique technologie, sur ces sites:

perbosc.eratosnoon.free.fr
astro.perbosc.free.fr
eratosthene.o-n.fr