The Great Scientiest

8/7/2019 The Great Scientiest

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The Great Scientiest

GALILEO GALILEI (1564-1642)


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INDEX

Sr.No. Contents Pg no.:

1 Introduction

2 Important Contribution

3 Scientific Instruments


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Galileo Galilei, Sunspot observations

Galileo Galilei 1612


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Enginnering

mathmetics


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physics


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thamometer

Galileo Thermometer - History

Galileo Galilei (1564-1642) discovered that the density of liquids change as the temperaturevaries. This scientific principle has become an elegant and functional work of art; The Galileo

Thermometer. When the temperature rises, the liquid in the glass tube becomes less dense,causing the floating glass spheres to sink one by one.

ReadingaGalileo Thermometer

Each sphere has a temperature indicating medallion. Depending on the actions of the spheres, the

temperature is read in a number of ways. If there is a sphere or globe floating mid way, themedallion says the temperature. If you have a group of spheres at the top and a group of spheres

at the bottom, you take the lowest one on the top (say 72) and the highest one on the bottom (say76), the temperature is the average of the two. Or add the two together (148) and divide by 2

equals 74. If all spheres are floating, the temperature is below the lowest sphere. If all the spheresare at the bottom, the temperature is above 84. And some are read by the lowest floating sphere.

Normally, it is the lowest medallion at the top.

A great gift item for anyone one who loves the unique, enjoysfilling their surroundings with beautiful, useful and conversational

pieces, and/or simply enjoys the mesmerizing piece of history. Thespheres or globes are multi-colored only. Listed Galileo

Thermometers come with Gold medallions.

24" - 2 degree increments 62 - 82 F18" - 2 degree increments 68 - 80 F


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17" - 4 degree increments 64 - 84 F15" - 4 degree increments 64 - 84 F

NOTE: Galileo Thermometers are for indoor use only.

15" Hanging six globes $ 74.95

17" Standing seven globes $ 89.95

17" Standing six globes $ 79.95

18" Hanging seven globes $149.95

24" Hanging eleven globes $179.95

24" Standing eleven globes $189.95

These make marvelous, wonderful presents and we can normally ship within 24 hours. However,should something happen in transit - we will gladly replace it, but need 'time' todo so.


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Galileos refracting telescope (1609)

Galileos refractor used two lenses to concentrate the light from celestial objects, delivering more

light to the human eye than it can gather on its own. The light was refracted through a spherical lens,forming an image.

The spherical shape of Galileos primary lens made the images blurry. The lens also split light intocolors, creating a fringe of color around bright objects.

The compound microscope, made of cardboard, leather and wood, is inserted in aniron support with three curved legs. The outer tube is covered in vellum greendecorated with gold tooling. There are three lenses (an objective, a field lens, and an


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eyepiece), all double-convex. The objective measures 11 mm in diameter and has athickness of 3.5 mm. The glass is clear with few imperfections; the edge is ground andthere are some fine chips. The field lens (diameter 30 mm, thickness 4.7 mm) is in acell that pushes into the bottom of the inner tube. The glass is amber-green, with airbubbles, and has a ground edge that is chipped; the eyepiece, with an aperture of 24

mm, also has some bubbles; it is protected by a wooden cap that screws onto themount. This very important instrument was said to have been built by Galileo, but isnow more plausibly attributed to Giuseppe Campani. Johannes Faber, fellow of theAccademia dei Lincei, gave the name "microscope" (microscopio) to Galileo's "smalleyeglass" (occhialino) in 1625.


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One of the many compasses built by Galileo starting in 1597. Possibly the modelpresented by Galileo to Cosimo II together with a copy of Le operazioni del compassogeometrico et militare [Operations of the geometric and military compass] (Padua,1606). The Galilean compassnot to be confused with drawing compassesis asophisticated and versatile calculating instrument for performing a wide variety of

geometrical and arithmetical operations, making use of the proportionality betweenthe corresponding sides of two similar triangles. It comprises three parts:- the two legs, held together by a round disk (pivot), whose faces (front and back) areengraved with numerous scales;- the quadrant, graduated with various scales, which is fixed by means of wing nuts tothe holes in the compass legs;- the clamp, a cursor inserted into one of the compass legs; keeps the instrumentvertical and can serve as an extension for the leg holding it.The priority for the instrument's invention was claimed by the Milanese BaldassarreCapra in a work published in Padua in 1607. Galileo replied effectively to Capra'sclaims with a peremptory Difesa [Defense].

The compass, initially kept in the Uffizi Gallery, was transferred in the mid-nineteenth century to the Tribuna di Galileo.

Weighing precious metals in air and then in water was presumably a

practice that was common among jewelers in Europe. Galileo had some

ideas for refining the practice and, at the age of 22, he wrote a little

tract about it, which he entitled La Bilancetta, or "The Little Balance."

What Galileo described was an accurate balance for weighing things in

air and water, in which the part of the arm on which the counter weight

was hung was wrapped with metal wire. The amount by which the

counterweight had to be moved when weighing in water could then be


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determined very accurately by counting the number of turns of the

wire, and the proportion of, say, gold to silver in the object could be

read off directly. This little tract illustrates the mixture of the

theoretical and practical that marks Galileo's science in contrast to that

of most of his contemporaries.A hydrostatic balance in other worlds is a

particular balance for weighing substances in water.

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