De Heliometri Structura Et Usu...

In this book, Zucconi describes his invention of a form of telescope known as a heliometer, which he used to observe the sun and measure its diameter. He explains the principles behind the heliometer, and describes the obstacles he faced in building and using it. This book is a fascinating glimpse into the world of 18th-century astronomy, and an important contribution to the history of the telescope.

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