Boscovich, Ruggero G.: Reflections on the Iris & Newton's Optics. Journal of the literary extract Rome 1747
Demonstration of a step pertaining to the maximum and minimum angle of the Iris, taken from prop. I. of the 2nd part of book I. of Newton's Optics; with some reflections on the same chapter by Father Ruggiero Giuseppe Boscovich... Extract from the Giornale de letterati, Rome, June 1747. Booklet bound later in full flexible parchment. Marbled edges. In-8ยฐ, pp. 29. Geometric figure at the end and demonstrative formulas in the text.