Lot #: 17488
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1795 CASSINI, G.M. - Two sheets for constructing an armillary sphere.
Two sheets for constructing an armillary sphere. |
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$2500 / ≈ €2230This item is available for immediate sale! Questions before Buying ?
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Description
Two sheets for constructing an armillary sphere. Cassini was a geographer and cartographer, but also perspective and architecture carver - one of Giovanni Battista Piranesi's best disciples - Cassini was one of Italy's last globe-makers in the XVIIIth century. His globes enjoyed widespread success as too did his Nuovo Atlante geografico delineato sulle ultime osservazioni, published in Rome from 1702 until 1801.
An armillary sphere is basically a skeletal celestial sphere with a model of the Earth or, later, of the Sun placed in the center. It is useful as a teaching tool and as an analog computer for solving various astronomical problems to a crude degree of accuracy.
Armillary spheres were developed by the Greeks in antiquity for use as teaching tools. In larger and more precise forms they were also used as observational instruments, being preferred by Ptolemy.
The Armillary sphere consists of two major components, the sphere and the stand. The heart of the Armillary sphere is the sphere itself, which was often made and used alone.
The central body in the sphere represents the Earth, which was, of course, considered the center of the Universe. The colures and the Equator (the rings defining the sphere) represent the firmament, that is, the sphere upon which the fixed stars reside.The band going around the sphere, at an angle to the equator, represents the zodiac. The line running through the middle of this band defines the ecliptic. The width of the band is ideally about ±9° to include the wandering of the Moon and planets above and below the Sun's path. The various constellations of the Zodiac also fall along with this band.
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This item is available for immediate purchase when a "Add to Cart" or "Inquire Now" button is shown.
Items are sold in the EU margin scheme
Payments are accepted in Euros or US Dollars.
Authenticity Guarantee
We provide professional descriptions, condition report (based on 45 years experience in the map business)Paulus Swaen warrants the authenticity of our items and a certificate of authenticity is provided for each acquired lot.
Condition and Coloring
We indicate the condition of each item and use our unnique HiBCoR grading system in which four key items determine a map's value: Historical Importance, Beauty, Condition/Coloring and Rarity.
Color Key
We offer many maps in their original black and white condition. We do not systematically color-up maps to make them more sellable to the general public or buyer.
Copper engraved or wood block maps are always hand colored. Maps were initially colored for aesthetic reasons and to improve readability. Nowadays, it is becoming a challenge to find maps in their original colors and are therefor more valuable.
We use the following color keys in our catalog:
Original colors; mean that the colors have been applied around the time the map was issued.
Original o/l colors; means the map has only the borders colored at the time of publication.
Colored; If the colors are applied recently or at the end of the 20th century.
Read more about coloring of maps [+]
Shipping fee
A flat shipping fee of $ 30 is added to each shipment by DHL within Europe and North America. This covers : International Priority shipping, Packing and Insurance (up to the invoice amount).
Shipments to Asia are $ 40 and rest of the world $50
We charge only one shipping fee when you have been successful on multiple items or when you want to combine gallery and auction purchases.
Read more about invoicing and shipping
FAQ
Please have a look for more information about buying in the BuyNow gallery
Many answers are likely to find in the general help section.
My Collection+
With My Collection+ you can collect all your favorite items in one place. It is free, and anyone can create his or her virtual collection.
Unless you are logged in, the item is only saved for this session. You have to be registed and logged-in if you want to save this item permanently to My Collection+. Read More[+]
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Two sheets for constructing an armillary sphere.
1795 CASSINI, G.M. - Two sheets for constructing an armillary sphere.
$2500 / ≈ €2230
Date: Rome, 1795
