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	Zacharias Janssen in TutorGig Encyclopedia
		1631) was a Dutch spectacle-maker of Middelburg, son of Hans Janssen.
		Zacharias Janssen is said to have made his fortune by counterfeiting Spanish copper coins in order to harass the enemy.
		Zacharias' son would later testify under oath that Hans Lippershey, also from Middelburg, had stolen his father's idea for a telescope.
	www.tutorgig.com /ed/Zacharias_Jansen (250 words)

	Zacharias Janssen - Great UK Deals
		Janssen (ca.1580-ca.1638) was a Dutch spectacle-maker of Middelburg,...
		Janssen (1580 - 1683) There appear to be many claimants to the...
		Zacharias' brother would later testify under oath that Hans...
	www.findspot.com /zacharias-janssen.htm (220 words)

	Molecular Expressions: Science, Optics and You - Timeline - Zacharias Janssen
		Zacharias Janssen is generally believed to be the first investigator to invent the compound microscope.
		The device fashioned by the Janssens, and described by Boreel, rose vertically from a brass tripod shaped like dolphins and was almost two and a half feet long.
		The Janssen Drawtube Microscope - As discussed above, the origin of the optical microscope is a matter of debate, but most scholars agree that the invention of the compound microscope can be credited to Zacharias Janssen in the late sixteenth century.
	micro.magnet.fsu.edu /optics/timeline/people/janssen.html (597 words)

	Zacharias Janssen - Encyclopedia, History, Geography and Biography
		He is sometimes given the credit for inventing the first compound microscope, probably with the help of his father in the year 1590, although the origin of the microscope is a matter of debate.
		Zacharias Janssen is said to have made his fortune by counterfeiting Spanish copper coins in order to harass the enemy.
		Zacharias' son would later testify under oath that Hans Lippershey, also from Middelburg, had stolen his father's idea for a telescope.
	www.arikah.com /encyclopedia/Zacharias_Janssen (272 words)

	Sixteenth Century Inventors and Inventions: 1500's EnchantedLearning.com
		Zacharias Janssen was a Dutch lens-maker who invented the first compound microscope in 1595 (a compound microscope is one which has more than one lens).
		Zacharias Janssen's father Hans may have helped him build the microscope.
		Hans and his son Zacharias Janssen are mentioned in the letters of William Boreel (the Dutch envoy to the Court of France) as having invented a 20X magnification microscope.
	www.enchantedlearning.com /inventors/1500.shtml (924 words)

	Science Fair Projects - Zacharias Janssen
		He is claimed to have been the first to invent a compound microscope, probably with the help of his father in the year 1595, although the origin of the microscope is a matter of debate.
		Credit for the first microscope is usually given to Zacharias Janssen in Middleburg, Holland, around the year 1595.
		Since Zacharias was very young at that time, it's possible that his father Hans made the first one, but young Zach took over the production.
	www.all-science-fair-projects.com /science_fair_projects_encyclopedia/Zacharias_Janssen (291 words)

	for the new starships...
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	autobiographyofzachariasjanssen.upscalemondays.com (994 words)

	they heaped upon (Site not responding. Last check: )
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		The hans and zacharias janssen cell theory microscope of the fred zacharias.The second zacharias dodds of false zacharias jansen.
	zachariasjanssen.upscalebham.net (1204 words)

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	robbyzachariasletmypeoplethink.upscalenclassyentertainment.com (984 words)

	Here’s a Quick Way to Know the History of the Microscope - TrueVision Microscopes (Site not responding. Last check: )
		Zacharias Janssen was born in Middleburg, Holland in the year 1595.
		At that year, Zacharias was just young that was why most people predicted that Hans was the one that developed the microscope.
		The invention of Zacharias Jansen, which is the first microscope, has a tube compacted with lenses on both ends.
	www.truevisionmicroscopes.com /resources/quick_history_of_microscope.html (826 words)

	Emailware.net - Zacharias janssen
		Zacharias Janssen was a Dutch spectacle-maker, son of Hans Janssen.
		Zacharias Janssen is generally believed to be the first investigator to invent...
		Zacharias Janssen (ca.1580-ca.1638) was a Dutch spectacle-maker of Middelburg,...
	www.emailware.net /zacharias-janssen.html (404 words)

	Zacharias Janssen inventor of compound microscope
		The Dutch claim that spectacle makers; Zacharias and his father Hans invented the microscope around 1595 in Middleburg, Zeeland.
		The construction was of 2 tubes that gave a magnification of 10 X. The lens in the eyepiece was bi-convex (bulging outwards on both sides), and the lens of the far end (the objective lens) was plano-convex (flat on one side and bulging outwards on the other side).
		This model was made according to a copy of the original one by the Janssen brothers that appeared in an antique shop in Paris in 1891.
	www.theojanssen.ca /documents/Janssen/Zacharias%20Janssen/Zacharias_Janssen.htm (198 words)

	This Month in Physics History
		Janssen was the son of a spectacle maker named Hans Janssen, in Middleburg, Holland, and while Zacharias is credited with inventing the compound microscope, most historians surmise that his father must have played a vital role, since Zacharias was still in his teens in the 1590s.
		Historians are able to date the invention to the early 1590s thanks to Dutch diplomat William Boreel, a longtime family friend of the Janssens who wrote a letter to the French king in the 1650s detailing the origins of the microscope.
		The Yorkshire scientist Henry Power was the first to publish observations made with a microscope, and in 1661 Marcello Malphigi used a microscope to provide clinching evidence in support of Harvey's theory of blood circulation when he discovered the capillary vessels in the lungs of a frog.
	www.aps.org /publications/apsnews/200403/history.cfm (904 words)

	NSDL Metadata Record -- Zacharias Janssen (1580-1638)
		This is a biographical sketch of Zacharias Janssen.
		Zacharias Janssen is generally believed to be the first investigator to invent the compound microscope.
		Though rudimentary when compared with modern models, the Janssen microscope was an important advance from contemporary use of a single lens for magnification purposes.
	www.nsdl.org /mr/443552 (99 words)

	EDUCATION PLANET:
		Quickly search online educational resources including over 130,000 teacher reviewed online lesson plans.
		Directory Home > Science > Biology > Microscopes > Janssen, Zacharias
		Chronology of Scientific Developments - Chronology of Scientific Developments 1514 Polish astronomer Nicolas Copernicus publishes ____, suggesting that the earth moves around the sun.
	www.educationplanet.com /search/Science/Biology/Microscopes/Janssen,_Zacharias (92 words)

	Molecular Expressions Microscopy Primer: Museum of Microscopy - The Janssen Microscope
		Janssen's microscope consists of three draw tubes with lenses inserted into the ends of the flanking tubes.
		The Janssen microscope was capable of magnifying images approximately three times when fully closed and up to ten times when extended to the maximum.
		No early models of Janssen microscopes have survived, but there is a candidate housed in the Middleburg Museum in Holland that some historians attribute to Janssen.
	microscopy.fsu.edu /primer/museum/janssen.html (274 words)

	aquarium-kosmos: Lichtmikroskop aus Wikipedia, der freien Enzyklopädie
		Dies basiert jedoch auf einer Erklärung von Zacharias Janssen selbst aus der Mitte des 17.
		Das Datum ist dabei fragwürdig, da Zacharias Janssen selbst erst 1590 geboren wurde.
		Allerdings hatte Zacharias Janssen ein Gerät mit dem gleichen Funktionsprinzip bereits ein Jahr zuvor auf der Frankfurter Messe vorgeführt.
	www.aquarium-kosmos.de /inhalt/10/mikroskop-lexikon (934 words)

	Cell Theory Historical time line activity
		Students will research historical events leading to the development of the cell theory.
		Research should include contributions made by the following people/scientists -Robert Hooke, Hans and Zacharias Janssen, Anton van Leeuwenhoek, Matthias Schleiden, Theodor Schwann, Rudolph Virchow, etc. and dates of their contributions.
		Students will report on their findings by constructing a timeline showing the chronology of the historical events leading to the development of the cell theory.
	www.usoe.k12.ut.us /curr/science/sciber00/7th/cells/sciber/timeline.htm (303 words)

	LESSON PLANET:
		Directory Home > Science > Biology > Microscopes > Janssen, Zacharias Lesson Plans
		Janssen, zacharias Lesson Plans (1 - 0 of 0):
		Education Planet is seeking experienced credentialed K-12 teachers to join our team of teacher reviewers.
	www.lessonplanet.com /search/Science/Biology/Microscopes/Janssen,_Zacharias (67 words)

	An Introduction to Microscopy (Site not responding. Last check: )
		Probably, spectacle makers in Middelburg, The Netherlands, invented both the compound microscope and the refracting telescope, between 1590 and 1610.
		The names most mentioned are those of Hans and Zacharias Janssen.
		The first well known users were van Leeuwenhoek and Hooke.
	www.microscopy-uk.org.uk /intro/histo.html (697 words)

	¿Quién inventó el microscopio óptico? (Site not responding. Last check: )
		Algunos autores, reivindican la invención del microscopio compuesto, en 1590, por parte de los holandeses Zacharias Janssen (1588-1638) y su padre Hans Janssen, fabricantes de anteojos.
		Según un relato, con aires de leyenda, Zacarias Janssen descubrió el microscopio en su infancia, mientras jugaba con otro niño con lentes dañadas en el taller del astrónomo e inventor alemán Hans Lippershey (1570-1619).
		El diplomático holandés William Boreel, testificaría poco después que Lippershey había robado la idea del instrumento a Zacharias Janssen, cuando éste tenía sólo 2 años de edad.
	www.genciencia.com /2007/05/13-quien-invento-el-microscopio-optico (793 words)

	Mikroskop-Museum_Frühe Geschichte_17.Jahrhundert
		der oft als Vater von Zacharias J. bezeichnet wird) und Zacharias
		Erfinder nicht mehr bestimmen, für das Teleskop gilt Johannes
		1608 Johannes Lipperhey (1579 - 1619, manchmal auch als Hans Lapperhey, Lippershey oder Lapprey zitiert), der ebenso wie Hans und Zacharias Janssen (s.o.) in Middlebourg lebte, präsentierte das zusammengesetzte Teleskop aus Konkav- und Konvexlinse und meldete es zum Patent an.
	www.mikroskop-museum.de /17jh.htm (1248 words)

	[No title]
		Zacharias Janssen was a Dutch lens‑maker who invented the first compound microscope in 1595 (a compound microscope is one which has more than one lens).
		Zacharias Janssen's father Hans may have helped him build the microscope.
		Hans and his son Zacharias Janssen are mentioned in the letters of William Boreel (the Dutch envoy to the Court of France) as having invented a 20X magnification microscope.
	www.israelect.com /reference/WillieMartin/Inventions.htm (11726 words)

	Zacharias Janssen
		Janssen, who combined a convex objective and a concave...
		Janssen in 1590, But the 'father of microscopy' is the Dutch...
		Janssen (ca.1580-ca.1638) was a Dutch spectacle-maker of Middelburg, son of Hans
	www.team21.co.uk /zacharias_janssen.html (194 words)

	micro-discovery
		Credit for the initial device has historically been given to a Dutch craftsman, Zacharias Janssen, working in the Netherlands late in the 16th century as a spectacle maker.
		Janssen subsequently extrapolated this approach to visual amplification by creatively attaching two such lenses at opposite ends of hand-held tube.
		Janssen’s device was unquestionably primitive, but the microscope (from Greek words meaning "to see small"), would shortly reveal a hitherto unimagined realm of life.
	bridge.ecn.purdue.edu /~piwc/w3-history/history/micro-discovery.html (2290 words)

	Compound Microscope \| World of Physics
		The next breakthrough in microscopy was the invention of the compound microscope; however, the origin of this device, as well as the identity of its inventor, is the subject of some debate.
		Around 1590, Janssen reportedly stumbled upon an idea for a multiple-lens microscope design, which he then constructed.
		Currently, it is believed that Janssen's son fabricated the story.
	www.bookrags.com /research/compound-microscope-wop (846 words)

	Hans And Zacharias Janssen S Contribution To The Cell Theory
		Wordpress Hans And Zacharias Janssen S Contribution To The Cell Theory
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	top500site.com /hans-and-zacharias-janssen-s-contribution-to-the-cell-theory.html (380 words)

	oreilly.com -- Online Catalog: Astronomy Hacks
		Although magnifying glasses and burning glasses had been known since classical times, and eyeglasses were in use by 1300, it was not until the final decade of the 16th century that instrument makers first created optical instruments for scientific exploration.
		The invention of the telescope is sometimes credited to Zacharias Janssen or James Metius, but evidence suggests that spectacle maker Hans Lippershey was the first to construct a telescope.
		One day, while holding a spectacle lens in either hand, Lippershey happened to view a nearby church steeple through both lenses and was astonished to see that it appeared larger than before.
	www.oreilly.com /catalog/astronomyhks/colophon.html (634 words)

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