Home Page About Us Books Prints and Maps SciLinks E-texts SciImages

Search our Online Catalog for
Books, Maps & Prints
Search type:
Search for:
Our store inventory is much more extensive than our online catalogue. If you do not find what you are searching for, contact us.
Browse Prints by Subject:
 

Click on thumbnail for a larger image
Breaking the Sheer
American, ca. 1845.  Very fine engraving on copper.  Very good copy, printed on a fine thin paper
8.5" x 11"
Print ID# 800008   $95.00

Click on thumbnail for a larger image
Eddystone Light House
1819.  Engraving.  Fine condition.
8" x 10.5"
Light House on the Eddystone Rock.
The Eddystone Rock Lighthouse is one of the most significant lighthouses ever constructed and stood as a monument to architectural and technological innovation. The dangerous Eddystone reef in the English Channel posed a constant threat to ships traveling along the southwestern coast of England. When the second lighthouse to stand on the site was destroyed by fire in 1755, a third was designed and built by a civil engineer, John Smeaton. His ingenious and influential structure became the model for all subsequent rock lighthouses. Print ID# 800048   $140.00
San Jacinto--Propeller, Feb 3, 1855.
1855.  New York.  Manuscript drawing on thin tracing paper..  John Shearman.  Good condition.
20x16" Image not available, inquiries welcome.
A Revolution in Transportation San Jacinto--Propeller, Feb 3, 1855. Drawing in en and ink, on vellum, completed in 1855, John F. Shearman, 1855. $2500 This is an extremely early engineering drawing of a modern propeller, executed only a year or so after the creation of the modern screw propeller by John Eriksson. Shearman's creation is devoid of the extra blades that appeared on the edges of the fans of Eriksson's first attempts, and as ultimately adopted as the standard response to this knotty fluid dynamics problem. The propeller pictured here was for the USS San Jacinto, a mail packet that ran along the west coast in the 1850s until it was sunk operating as a blockade runner for the Confederate States in 1864. It was a pretty large propeller--more than 15 feet in diameter--and moved the ship it was attached to more than 22 feet for every revolution of the blade. Shearman was an engineer who worked at the Brooklyn Iron Works, Roslyn Navy Yard (New York) and a number of other places, practicing his trade from 1845 through 1888. Today he is laregly forgotten. Print ID# 800216   $2,500.00

Click on thumbnail for a larger image
The Wind changed three Points
1845, American.  Engraving on copper.  Very good condition.
8.5" x 11"
Print ID# 800093   $75.00


Email: jfptak@thesciencebookstore.com
©2002-2009 by J.F.Ptak Books. All rights reserved. Site maintenance services by Scarlett's Web®