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He who understands Archimedes and Apollonius will admire less the achievements of the foremost men of later times.
In G. Simmons, Calculus Gems, New York: McGraw Hill Inc., 1992.
Loci: Convergence
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Mathematical Treasures
Giuseppe Alberti's Instruzioni pratiche per l’ingenero civile
Plate VII from Giuseppe Alberti’s Instruzioni pratiche per l’ingenero civile, (1774) [Practical Instructions for Civil Engineers]. Alberti (1712 - 1768) was an Italian engineer and architect. This illustration on page 298 explains the triangulation method of land measurement employing a sighting staff or surveyor’s cross. The instrument shown contains a compass for marking bearings.