BELGIUM (1942) Bollandus*. Vesalius*. Stevin*. Helmont*. Dodones*. Mercator*. First Day cover. Scott Nos B319-26, Yvert Nos 593-8.
$5
SPAIN (1946) Benito Jerónimo Feijóo y Montenegro*. Maximum card with First Day cancel. Scott No 747. Monk who led the Spanish Enlightenment.
$10
FINLAND (1955) Johan Jakob Nervander*. Unaddressed FDC with cachet and thematic cancel. Scott No 325. Founded geomagnetic observatory in Helsinkki.]
$5
U.S.A. (1957) T-square. Ruler. Curve-drawing shape. Red meter cancel on fragment, P.B. No. 344326, "Engineer's Supplies - EBK Co."
$15
EAST GERMANY (1957) Jungius*. Euler*. Hertz*. Unaddressed FDC with cachet and thematic cancel. Scott Nos 352-4.
$8
FRANCE (1957) Newton*. Trial color proof. Scott No 861, Yvert No 1136.
$30
EAST GERMANY (1958) Max Planck*. Unaddressed FDC with cachet and thematic cancel. Scott Nos 383-4.
$5
COLOMBIA (1958) Francisco José de Caldas*. Hypsometer*. Unaddressed FDC with cachet and thematic cancel. Scott Nos 680,C309-10. International Geophysical Year.
$5
POLAND (1959) Pasteur. Newton. Copernicus. Unaddressed FDC with cachet and thematic cancel. Scott Nos 883-5..
$5
GERMANY (1963) Scientific research. Red meter cancelation "Der Bundesminister fur wissenchafftliche Forschung."
$15
AUSTRIA (1964) Athena*. Black print. Scott No 726, Yvert No 989. 2nd Scientific & Parliamentary Congress.
$20
JAPAN (1966) Map of Pacific*. Specimen. Pacific Science Congress. Scott No 893, Yvert No 848.
$5
SPAIN (1967) Averroes Ibn Rusd*. Maximum card with First Day cancel. Scott No 1461, Yvert No 1444. Andalusian polymath.
$15
SPAIN (1967) José de Acosta*. Maximum card with First Day cancel. Scott No 1462, Yvert No 1445. Jesuit missionary and naturalist.
$15
SPAIN (1967) Andrés Laguna*. Maximum card with First Day cancel. Scott No 1464, Yvert No 1447. Botanist, pharmacologist, and physician.
$15
HUNGARY (1968) Society for Popularization of Scientific Knowledge*. Imperforate. Scott No 1925.
$4
AUSTRIA (1971) August Neureich*. Black print. Scott No 899, Yvert No 1193. Botanist.
$20
AUSTRIA (1971) Erich Tscherman-Seysenegg*. Black print. Scott No 913, Yvert No 1206. Botanist who rediscovered Mendel's laws of genetics.
$20
MEXICO (1971) Newton*. Kepler*. Galileo*. Set of 3 unaddressed FDCs with cachets. Scott Nos C377-9.
$10
U.S.A. (1972) Ben Franklin*. Maximum card with First Day cancel. Scott No 1396, Yvert No 970.
$3
FRANCE (1973) Academy of Overseas Sciences*. Maximum card with Special First Day Cancel. Scott No 1375, Yvert No 1760.
$5
FRANCE (1973) Academy of Overseas Sciences*. Trial color proof pair Scott No 1375, Yvert No 1760.
$30
MALTA (1974) Scientific Research ship "METEOR"*. Envelope with thematic handstamps.
$10
BELGIUM (1974) Adolphe Quetelet. Unaddressed FDC with cachet and thematic cancel. Scott No 885, Yvert No 1738. Belgian astronomer, mathematician, statistician and sociologist.
$5
HUNGARY (1974) Janos Segner*. Water wheel*. FDC with cachet and thematic cancel. Scott No 2312. Considered the father of the water turbine.
$5
SINGAPORE (1977) Singapore Science Center. Registered FDC with cachet and thematic cancel. Scott Nos 288-91.
$6
MALDIVES (1977) Newton*. Galileo*. Euclid*. Mendel*. Unaddressed FDC. Scott Nos 1268-71.
$10
MALI (1977) Newton*. Apple*. Rocket*. Unaddressed FDC. 250th anniversary of Newton's death. Scott No C301, Yvert No PA292.
$5
SWEDEN (1978) Fritz Haber*. Max Planck*. Unaddressed FDC with cachet and thematic cancel. Scott Nos 1271-2.
$5
AUSTRIA (1979) Stylized flower*. Black proof. Scott No 1128, Yvert No 1445. UN Conference on Science and Technology.
$7
AUSTRIA (1981) Seibersdorf Research Center*. Black print. Scott No 1180, Yvert No 1502. 25th anniversary.
$15
AUSTRIA (1981) Ludwig Boltzmann*. Maximum card with thematic cancel. Scott No 1184.
$5
SAN MARINO (1982) Archimedes*. Copernicus*. Galileo*. Lavoisier*. Newton*. Unaddressed FDC with cachet and thematic cancel. Scott Nos 1021-5.
$6
SWITZERLAND (1983) Micrometer*. Maximum card with First Day cancel. Scott Nos 736, Yvert No 1177.
$10
ROMANIA (1983) Famous men*. Set of 2 unaddressed FDC with cachet and thematic cancel. Scott Nos 3135-6.
$8
AUSTRIA (1983a) Karl von Terzaghi*. Black print. Scott No 1255, Yvert No 1582. Founder of Scientific Subterranean engineering and the father of soil mechanics.
$25
FRANCE (1986) City of Science and Industry*. Maximum card with thematic cancel. Scott No 2001, Yvert No 2409.
$5
ROMANIA (1986) Famous men*. Unaddressed FDC with cachet and thematic cancel. Scott Nos 3411-4.
$5
F.S.A.T. (1988) Robert Gessain*. Maximum card. Scott No 135, Yvert No 134.
$5
GERMANY (1990) Maze*. Exclamation, question marks*. MUSTER (Specimen) overprint. Youth Science & Technology Competition. Scott No 1597, Yvert No 1285.
$15
DOMINICA (1991) Gallileo*. Leaning tower of Pisa*. Unaddressed FDC with cachet. Scott No 1366
$10
F.S.A.T. (1992) Paul Tchernia*. Maximum card. Scott No 169, Yvert No 167.
$5
HONDURAS (1993) Science & Technology. Set of 4 on Unaddressed FDC with cachet and thematic cancel. Scott Nos 679-82.
$5
F.S.A.T. (1993) Biological researchers*. Microscope*. Maximum card. Scott No C125, Yvert No PA126.
$10
LIECHTENSTEIN (1994) Andean condor*. Rhexia cardinalis*. Set of 2 maximum cards. Alexander Humboldt. Scott Nos 1022-3, Yvert Nos 1020-1.
$8
POLAND (1994) Inventions*. Unaddressed FDC with cachet and thematic cancel. Scott Nos 3193-4. Petroleum lamp. Astronomical sighting device.
$4
U.S.A. (1971) JPL Expedition*. Letter to Germany with oval cachet of Soil Microbial & Ecological Studies in Antarctica.
ARGENTINA (1987) Antarctic Treaty. Unaddressed FDC with cachet. Scott No 1581.
LIECHTENSTEIN (1994) Earth*. Air*. Fire*. Water*. Set of 4 maximum cards. Scott Nos 1039-42, Yvert Nos 1040-3.
CHRISTMAS ISLAND (1978) Willem de Vlamingh*. John F.L.P. Maclear*. Sir John Murray*. Sir Harold Spencer-Jones*. *. Unaddressed FDCs with cachet and thematic cancel. Scott Nos 70-2,84. Famous visitors.
MONACO (1987) Isaac Newton*. Theory of gravitation*. Unaddressed FDC. Yvert No 1607. Scott No 1601.
FRANCE (1986) Auto*. Train*. Mulhouse Technical Museum. Maximum card with thematic cancel. Scott No 2025, Yvert No 2450.
AFARS & ISSAS (1972) Calmette*. Guerin*. Caduceus*. Bacterial culture*. Imperforate. Scott No C70, Yvert No PA77. Chemists and bacteriologists, benefactors of mankind.
AFARS & ISSAS (1972) Pasteur*. Crystals*. Glassware*. Calmette*. Guerin*. Caduceus*. Bacterial culture*. First Day Cover with cachet of busts. Scott Nos C70-1, Yvert No PA77-8. Chemists and bacteriologists, benefactors of mankind.]
HUNGARY (1976) Georgian dancer*. Imperforate. Scott No 2441. Science & Culture House.
GERMANY (1983) Gutenberg press. Herzian electromagnetic waves. Maximum card with thematic cancel. Scott Nos 1392-3, Yvert Nos 1007-8.
FRANCE (1970) De Broglie*. Ray-producing apparatus*. Philatelic First Day document with special engraving thematically related to the stamp and printed description and explanation of the stamp on the reverse. Scott No B439, Yvert No 1627.
CZECHOSLOVAKIA (1987) Mathematicians & physicists*. Registered FDC with cachet and thematic cancel. Scott Nos 2663-5.
AFARS & ISSAS (1973) Roentgen*. X-ray*. Trial color plate proof pair. Scott No C84, Yvert No PA91.
CHAD (1976) Sinichiro Tamagana*. Unaddressed FDC with cachet. Scott No C198, Yvert No PA185.
UPPER VOLTA (1977) Nobel winners Lagerlof, Marconi, Russell, Pauling, Koch*. Set of 5 imperforates. Scott Nos 440-4, Yvert Nos 428-33.
ANTIGUA (1991) Einstein*. Nobel*. Unaddressed FDC with S/S of local stamp of Redonda.
HUNGARY (1977) Newton*. Double convex lens*. Registered FDC with cachet and thematic cancel. Scott No 2485. Full sheetlet.
GERMANY (1987) Color scale*. Graph*. Unaddressed FDC with cachet and thematic cancel. Joseph von Fraunhofer, optician & physicist. Scott No 1501, Yvert No 1145.
GERMANY (1987) von Fraunhofer*. Optical devices*. Illustrated cancel on envelope. Joseph von Fraunhofer, optician & physicist. Scott No 1501, Yvert No 1145.
MONGOLIA (1977) Newton*. Space scenes*. Unaddressed FDC. Scott No 951.