11,741 Free Images of Scientific Instruments

jacques burkhardt scientific drawings harvard university jacques burkhardt watercolor on paper pencil on paper

Snail (side view) (1855), Jacques Burkhardt, 1855-??-??

jacques burkhardt scientific drawings watercolor on paper

Ophioderma (Charleston, South Carolina, 1 December 1847), Jacques Burkhardt

jacques burkhardt scientific drawings pencil on paper

Corniger spinosus Agassiz (orange-red), Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Macrodon trahira, Jacques Burkhardt, 23 May 1865

jacques burkhardt scientific drawings watercolor on paper

Hypopygus sp. (Lake January, Brazil), Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Unidentified fish (Sombrero Islands, West Indies, September 1859), Jacques Burkhardt, 1859-??-??

jacques burkhardt scientific drawings watercolor on paper

Ophiothrix angulata (five specimens) (Charleston, South Carolina), Jacques Burkhardt

jacques burkhardt scientific drawings pencil on paper

Engraulis Janeiro, Jacques Burkhardt, 8 July 1865

jacques burkhardt scientific drawings watercolor on paper

Tortoise (side view) (March 1851), Jacques Burkhardt, 1851-03-??

jacques burkhardt scientific drawings watercolor on paper

Cabrinha, Jacques Burkhardt

jacques burkhardt scientific drawings pencil on paper

Microsternarchus bilineatus (Lago Maximo, Brazil, 1866), Jacques Burkhardt, 1866-??-??

jacques burkhardt scientific drawings watercolor on paper

Fish anatomical cross section (New York, N.Y., 1848), Jacques Burkhardt, 1848-??-??

jacques burkhardt scientific drawings watercolor on paper

Panulirus argus (Boston, Mass., August 1860) (5 drawings), Jacques Burkhardt, 1860-08-??

jacques burkhardt scientific drawings pencil on paper

Snake (8 February 1860; snake and head), Jacques Burkhardt, 8 February 1860

jacques burkhardt scientific drawings watercolor on paper

Needlefish head (top view) (New York, N.Y., 1848), Jacques Burkhardt, 1848-??-??

jacques burkhardt scientific drawings pencil on paper

Pectinibranchiata (January 1853), Jacques Burkhardt, 1853-01-??

jacques burkhardt scientific drawings pencil on paper

Petrolisthes (1855) (2 drawings), Jacques Burkhardt, 1855-??-??

jacques burkhardt scientific drawings pencil on paper

Testudo polyphemus head, Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Needlefish (top view) (Boston, Mass., 1848), Jacques Burkhardt, 1848-??-??

jacques burkhardt scientific drawings pencil on paper

Gardinho, Jacques Burkhardt, 19 July 1865

jacques burkhardt scientific drawings watercolor on paper

Unidentified fish, Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Hemirhamphus brasiliensis Cuv., Jacques Burkhardt, 4 May 1865

jacques burkhardt scientific drawings watercolor on paper

Three brittle-stars (Tortugas, Florida, 11 February 1852), Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Tima formosa (Boston, Mass., 17 May 1859), Jacques Burkhardt

jacques burkhardt scientific drawings pencil on paper

Chelys fimbriata (side view) (Amazon River; Cambridge, Mass., 7 March 1863), Jacques Burkhardt

jacques burkhardt scientific drawings pencil on paper

Porichthys, Jacques Burkhardt, 10 July 1865

jacques burkhardt scientific drawings watercolor on paper

Ischypterus Mortoni (Fossil) (New York, N.Y., 1861), Jacques Burkhardt, 1861-??-??

jacques burkhardt scientific drawings watercolor on paper

Unidentified fish (March 1854), Jacques Burkhardt, 1854-03-??

jacques burkhardt scientific drawings watercolor on paper

Tima formosa (Boston, Mass., May 1859), Jacques Burkhardt, 1859-05-??

jacques burkhardt scientific drawings pencil on paper

Tortoise on grass (side view) (1858), Jacques Burkhardt, 1858-??-??

jacques burkhardt scientific drawings pencil on paper

Uaru amphiacanthoides (Lago Maximo, Brazil), Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Unidentified amphibian (June 1869; top view and bottom view), Jacques Burkhardt, 1869-06-??

jacques burkhardt scientific drawings watercolor on paper

Pleurogramma (Acara petit) (Lago Maximo, Brazil), Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Planorbis (back of sheet) (Fresh Pond, Cambridge, Mass., 7 May 1848), Jacques Burkhardt

jacques burkhardt scientific drawings pencil on paper

Sternotherus odoratus (anatomical part) (three views) (Boston, Mass., 8 June 1847), Jacques Burkhardt

jacques burkhardt scientific drawings pencil on paper

Mamamo, Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Unidentified amphibian (23 January 1869; top view and side view), Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Saxicava (Nahant, Mass., 1864) (9 drawings), Jacques Burkhardt, 1864-??-??

jacques burkhardt scientific drawings pencil on paper

Three mollusks (Nantucket, Mass.?), Jacques Burkhardt

jacques burkhardt scientific drawings pencil on paper

Satanoperca lilith, Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Pomacentrus, Jacques Burkhardt, 3 June 1865

jacques burkhardt scientific drawings watercolor on paper

Monacanthus, Jacques Burkhardt, 26 June 1865

jacques burkhardt scientific drawings watercolor on paper

Needlefish head (New York, N.Y., 1848), Jacques Burkhardt, 1848-??-??

jacques burkhardt scientific drawings pencil on paper

Cistudo carolina (side view of head), Jacques Burkhardt

jacques burkhardt scientific drawings pencil on paper

Callianassa major (10 January 1845) (2 drawings), Jacques Burkhardt, 10 January 1845

jacques burkhardt scientific drawings pencil on paper

Plectropoma puella, Jacques Burkhardt, 3 June 1865

jacques burkhardt scientific drawings watercolor on paper

Unidentified fish (Santa Cruz, California, March 1854), Jacques Burkhardt, 1854-03-??

jacques burkhardt scientific drawings watercolor on paper

Ophiopholis aculeata (Boston Harbor, Mass., January-February 1848), Jacques Burkhardt

jacques burkhardt scientific drawings pencil on paper

Pimelodus? (Belem, Para, Brazil), Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Gerres lineatus, Jacques Burkhardt, 13 July 1865

jacques burkhardt scientific drawings watercolor on paper

Three needlefish heads (Boston, Mass., 1848), Jacques Burkhardt, 1848-??-??

jacques burkhardt scientific drawings pencil on paper

Pandora trilineata (East Boston, Mass., 21 June 1848), Jacques Burkhardt

jacques burkhardt scientific drawings pencil on paper

Unidentified fish (Nahant, Mass., 31 July 1850), Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Two echinoderms (Neuchatel, Switzerland, 1837), Jacques Burkhardt, 1837-??-??

jacques burkhardt scientific drawings watercolor on paper

Mugil, Jacques Burkhardt, 8 June 1865

jacques burkhardt scientific drawings watercolor on paper

Crangon heterochaelis (23 December 1851), Jacques Burkhardt, 23 December 1851

jacques burkhardt scientific drawings watercolor on paper

Unidentified fish (Bahamas, West Indies, March 1854), Jacques Burkhardt, 1854-03-??

jacques burkhardt scientific drawings watercolor on paper

Malaclemys head, Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Saurus longirostris, Jacques Burkhardt, 18 July 1865

jacques burkhardt scientific drawings watercolor on paper

Dolphin? (bottom and side views) (Cambridge, Massachusetts, 31 December 1849), Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Vandellia? (Lake January, Brazil, 20 November 1865), Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Ocypode albicans (Bosc), Jacques Burkhardt, 1855-02-02?

jacques burkhardt scientific drawings pencil on paper

Serranus (Bermuda, December 1862), Jacques Burkhardt, 1862-12-??

jacques burkhardt scientific drawings watercolor on paper

Physalia (1858), Jacques Burkhardt, 1858-??-??

jacques burkhardt scientific drawings watercolor on paper

Three needlefish heads (Cambridge, Mass., 1849), Jacques Burkhardt, 1849-??-??

jacques burkhardt scientific drawings pencil on paper

Two brittle-stars (Key Biscayne, Florida), Jacques Burkhardt

jacques burkhardt scientific drawings pencil on paper

Uaru amphiacanthoides (Lago Maximo, Brazil; adult), Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Tatia sp. (Teffe, Brazil, 13 October 1865; 2 fish), Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Gallo, Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Sea bass? (New Providence Island, Bahamas, April 1861), Jacques Burkhardt, 1861-??-??

jacques burkhardt scientific drawings watercolor on paper

Stingray (Boston, Mass., 10 January 1860), Jacques Burkhardt

jacques burkhardt scientific drawings pencil on paper

Tortoise (bottom view) (April 1851), Jacques Burkhardt, 1851-04-??

jacques burkhardt scientific drawings watercolor on paper

Solenomya (Nahant, Mass., 1864), Jacques Burkhardt, 1864-??-??

jacques burkhardt scientific drawings pencil on paper

Unidentified fish (Santa Cruz, California, March 1854), Jacques Burkhardt, 1854-03-??

jacques burkhardt scientific drawings watercolor on paper

Clupanodon aureus Spix, Jacques Burkhardt, 8 June 1865

jacques burkhardt scientific drawings watercolor on paper

Eight turtles and six turtle heads, Jacques Burkhardt

jacques burkhardt scientific drawings pencil on paper

Pimelodus sp. (Tabatinga and Tonantins, Brazil), Jacques Burkhardt

jacques burkhardt scientific drawings pencil on paper

Conger, Jacques Burkhardt, 11 June 1865

jacques burkhardt scientific drawings watercolor on paper

Two starfish (Neuchatel, Switzerland, January 1837), Jacques Burkhardt, 1837-01-??

jacques burkhardt scientific drawings pencil on paper

Nine fish-scale cross sections (New York, N.Y.), Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Needlefish tail?, Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Eight mollusk drawings (Nahant, Mass., 1864), Jacques Burkhardt, 1864-??-??

jacques burkhardt scientific drawings watercolor on paper

Unidentified fish (Santa Cruz, California, March 1854), Jacques Burkhardt, 1854-03-??

jacques burkhardt scientific drawings watercolor on paper

Two starfish (Cambridge, Mass., 1851), Jacques Burkhardt, 1851-??-??

jacques burkhardt scientific drawings watercolor on paper

Three needlefish heads (Cambridge, Mass., 1849), Jacques Burkhardt, 1849-??-??

jacques burkhardt scientific drawings pencil on paper

Emerita talpoida (Say), Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Unidentified specimen (Cambridge, Mass., June 1852), Jacques Burkhardt, 1852-06-??

jacques burkhardt scientific drawings watercolor on paper

Ozotheca odorata (side and front views of head) (1855), Jacques Burkhardt, 1855-??-??

jacques burkhardt scientific drawings pencil on paper

Needlefish (Lake Erie, Buffalo, New York, February 1854), Jacques Burkhardt, 1854-02-??

jacques burkhardt scientific drawings watercolor on paper

Planorbis (front of sheet) (Fresh Pond, Cambridge, Mass., 7 May 1848), Jacques Burkhardt

jacques burkhardt scientific drawings pencil on paper

Two mollusks and anatomical cross-section (Nahant, Mass., 1864), Jacques Burkhardt, 1864-??-??

jacques burkhardt scientific drawings pencil on paper

Chelys fimbriata (top view), Jacques Burkhardt

jacques burkhardt scientific drawings pencil on paper

Tortoise (top view) (April 1851), Jacques Burkhardt, 1851-04-??

jacques burkhardt scientific drawings watercolor on paper

Symphysodon aequifasciata, Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Pagrus or Argyrops (New York, 7 November 1847), Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Plagusia, Jacques Burkhardt, 8 June 1865

jacques burkhardt scientific drawings watercolor on paper

Three views of two fossils (New York, N.Y.), Jacques Burkhardt

jacques burkhardt scientific drawings watercolor on paper

Two mollusks (Nahant, Mass., 1864), Jacques Burkhardt, 1864-??-??

jacques burkhardt scientific drawings pencil on paper

Mya arenaria (Nahant, Mass., 1864) (Clam plus 3 cross sections), Jacques Burkhardt, 1864-??-??

jacques burkhardt scientific drawings pencil on paper

Unidentifiable fish (Jose Assu, Brazil), Jacques Burkhardt

jacques burkhardt scientific drawings pencil on paper

1701 - 1800 of 11,741 Next page

/ 118