A solid brass sundial compass. A Precision sundial for accurate time measurements using the sun.
Astrolábios gif - Pesquisa Google
A clever German engineer called Hermann Böhm has been making miniature Stirling engines for 15 years now. They run on spirit and are made of the same materials as the real thing, and with the same care and precision. We offer here two of his most impressive models – all the parts are of brass, aluminium or stainless steel - in two versions....
ancient chinese ships - Pesquisa Google
Double Frame Bridge Sextant - 1798
arkaim female inhabtante - Pesquisa Google
Steam Engine by Matthew Amt
medieval soldier - Pesquisa Google
Orrery - a heliocentric model showing the relative movements and position of the moon + planets