Dear Sundial Friends, Dear Retians, I would like to draw your attention to a nice exhibition on reconstructions of sundials and other astronomical instruments in Craveggia, Northern Italy. I have already seen a number of them and was very impressed.
They have been reconstructed by Guido Dresti from Craveggia and will be exhibited from 27 of July to 1 of September this year. The collection consists of antique sundials and astronomical instruments, all of which have been reconstructed by Guido Dresti. They are all fully functional and the associated calculations stem from the precise movements of the Sun and other celestial bodies. There are about fifty pieces, representing forty-two different instruments, which in turn can be grouped into three types of sundial, nine models of astrolabes and various astronomical instruments, such as the *torquetum*, the armillary sphere, the moon volvelle, the *equatorium* of Campano da Novara, and the *astrarium* of Giovanni Dondi. Additionally, the collection includes a model of a monastic alarm clock and also illustrates the application of the pendulum by Galileo to clock escapements. The collection thereby admirably illustrates the transition from measuring time using solely astronomical phenomena, to measuring time using mechanical clocks. I really recommend your visit there! Best regards Juergen Hoefeld Here is a link to the exhibition leaflet: http://www.osservatoriogalilei.com/home/images/Eventi/Misura_del_tempo_ Dresti.pdf
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