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‘Kernresonanzabsorption von Gammstrahlung in Ir191’ [in: Die Naturwissenschaften … fünfundvierzigster Jahrgang].

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First appearance of Mössbauer’s PhD work on the recoilless nuclear fluorescence of gamma rays in 191 iridium, later named the Mössbauer effect, which involves the recoil-free emission and absorption of gamma radiation by an atomic nucleus bound in a solid. The effect was later used by Robert Pound and Glen Rebka to provide experimental verification for Albert Einstein’s general theory of relativity. For his discovery Mössbauer was awarded the Nobel Prize in Physics in 1961.

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WITH A MANUSCRIPT DESIGN FOR A SUNDIAL TALIANI, Giuseppe. 

Orologi riflessi, per mezo di un picciolo specchio parallelo o perpendicolare all’orizonte. 

Only recorded edition, rare, of this work by mathematician Taliani on the construction of sundials in the interior of buildings, to be achieved through mirrors reflecting solar rays – our copy uniquely furnished with a contemporary large hand-drawn representation of the face of a sundial.  Giovanni Battista Benedetti of Imola (1530–1590), pioneer of Italian mathematical humanism, had first applied reflection to sundials.  Taliani, a true child of the Galilean and experimental era, develops the notion of exploiting the most refined geometry and applying it to material construction, taking great care in the visual representation of his solutions. 

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[GUARINI, Giambattista Lascaris].

Ragionamenti filosofici.

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