Images of scientists including Haber, Hahnemann, Haller, Hamilton, Harrison, Hartenkeil, Hauy, Hegel, Heister, Hellwig, Helmholtz, Helmont, Hempel, Hermbstaedt, Hildebrand, Hittorf, Hobbs, Hoffmann, Hofmann, Holtschuher, Huddart, Humboldt, Hume, Hunter, Huxley, Huygens and others are available here.  Digitized by Mary Parker.