Machinæ coelestis pars prior[-posterior]
Machinae Coelestis is a 1673 astronomical instrument treatise by Johannes Hevelius, with plates engraved by Andreas Stech and printed by S. Reiniger at Danzig (Gdańsk) for astronomers and instrument makers. The first picture is a dense engraved plate of telescopes, quadrants, and armillary-style gear wheels, and the second is a close view of a fine linework instrument mechanism with a screw, bracket, and numbered detail, which suggests dense technical plates for diagrammatic composition.
![Picture 1 of 2 from Machinæ coelestis pars prior[-posterior] (1673), leaf 355](https://img.insideoutlibrary.com/img/200/ia-Machinacoelesti1Heve-355-0.webp)
![Picture 2 of 2 from Machinæ coelestis pars prior[-posterior] (1673), leaf 366](https://img.insideoutlibrary.com/img/200/ia-Machinacoelesti1Heve-366-0.webp)