I have been collecting books in the history of science, medicine, and technology since I was in college. The collection has followed two principal threads: books with noteworthy illustrations, and books about astronomical expeditions during the 18th century. Below are links to some notes and some illustrations from a few of the books in my collection.

Electricity and Magnetism
Martinus van Marum, Description d'une tres grande Machine Electrique, Haarlem, 1785, 1987

Aeronautics
Barthelemi Faujas de Saint-Fond, Description des experiences de la machine aerostatique de MM de Montgolfier, Paris 1783

Architecture
Josef Furttenbach, Architecture Civilis, Ulm 1628
Vitruvius/Perrault, Les dix livres d'architectura, Paris 1684

Astronomy
Tsunemori Iguchi, Tenmon Zukai, Osaka 1689

Astronomical and other instruments
Johannes Hevelius, Machinae Coelestis, Gdansk 1673
Johannes Stoeffler, Elucidatio fabricae ususque astrolabii, Oppenheim 1524
Petrus Apianus, Instrument Buch, Ingolstadt 1533
Philippe Danfrie, Declaration de l'usage du graphometre, Paris 1597
Nicolas Bion, Traite de la construction et principaux usages des instrumens de mathematique, Paris 1725
Jacques Besson, Le Cosmolabe , Paris 1567 -1569

Classical antiquity
Aristotle De Coeli, De Anima, etc , Augsburg 1518-1520

Cryptography
August II of Luneberg, Cryptomenytices, Luneberg 1624

Marvelous Machines
Fredrich Knauss, Selbstschreibende Wundermaschinen, Vienna 1780
Johann Bessler, Perpetuum Mobile Orffyreanum, Kassel 1719

Optics
Cherubin d'Orleans, La dioptrique oculaire, Paris 1671
Niklass Hartsoeker, Essay de dioptrique, Paris 1694
Marc Thomin, Traite d'optique mechanique, Paris 1749
Francois d'Aguilon, Opticorum libri sex, Antwerp 1613
Isaac Newton, Opticks, London 1704

Mining and metallurgy
Vanoccio Biringuccio, De la pyrotechnie, Paris 1572
Lazarus Ercker, Beschreibung allerfurnemisten mineralischen ertzt unnd bergwercks arten, Frankfurt 1580

Geology
Athanasius Kircher, Mundus subterraneus, Amsterdam 1665
Music
Athanasius Kircher, Musurgia Universalis , Rome 1650
Athanasius Kircher
Athanasius Kircher

Technology
Georg Bockler, Theatrum Machinarum Novum, Cologne 1662
Agostino Ramelli, Le diverse et artificiose machine, Paris 1588
Vittorio Zonca, Di Nuovo Teatro di Machine, Padua 1657
Jacques Besson, Theatre des Instrumens, Paris 1594

Anatomy
Bernard Albinus, Eustachi/Tabulae anatomiae, Leiden 1744
William Cowper, Myotomia Reformata, London 1724
Andreas Vesalius, De humani corporis fabrica, Venice 1568
Johann Remmelin, Catoptrum microcosmicum, Augsburg 1619
Jacques Gamelin, Nouveau Recueil d'Osteologie et Myologie, Toulouse 1779

Microscopy
Marcello Malpighi, Anatome Plantarum, London 1675 - 1679
Niklass Hartsoeker, Essay de dioptrique, Paris 1694

18th century astronomy expeditions
Expeditions to observe the transit of Venus
Expeditions to measure the shape of the earth
Experiments and expeditions to find longitude at sea

Newton
Isaac Newton, Principia Mathematica, Cambridge 1713
Isaac Newton, Opticks, London 1704
FMA Voltaire, Elemens de la philosophie du Neuton, Amsterdam 1738
M de Chatelet, Principes mathematiques de la philosophie naturelle, Paris 1759

Perspective
Jean-Francois Niceron, La Perspective Curieuse, Paris 1652
Andrea Pozzo, Perspective Proper, London (ca 1725)
Emmanuel Maignan, Perspectiva Horlogia, Rome 1648
Pietro Accolti, Lo inganno degl'occhi, prospettiva pratica, Firenze 1625