The field of graph theory has been indubitably influenced by the study of planar graphs. This thesis, consisting of five chapters, is a historical account of the origins and development of concepts pertaining to planar graphs and their...
Illustrations; Portraits; Men; Emperors; Rulers; Upper class; People associated with politics & government; Military officers; Military personnel; People associated with military activities; Soldiers; Cyclists; Military leadership; Leadership;...
Artwork by David Biber. [Inspired by Jacques-Louis David's Napoleon Crossing the Alps, c. 1800; also known as: Napoleon at the Saint-Bernard Pass; Bonaparte Crossing the Alps].
A railroad crossing sign stands on a small patch of grass. The white sign is framed by the foliage of trees in the background. Printed on the crossbars are "Railroad" and "Crossing". Print on the vertical post: "Look Both...
“The images on Trajan’s Column are not only notable for their bold artistry, but also constitute an important historical record. This section of the frieze vividly illustrates the painstaking accuracy of the depictions. The lower register shows...
Cardiac mapping has become an important area of research for understanding the mechanisms responsible for cardiac arrhythmias and the associated diseases. Current technologies for measuring electrical potentials on the surface of the heart are...
Louisville and Nashville Railroad Company; Railroad companies; Railroad crossings
Louisville & Nashville Railroad grade crossing at Baxter Avenue, Louisville, Kentucky. Close-up of an engine on a bridge (photographed from behind) and the profile of a man on the bridge in the sunlight, wearing a suit and hat. Another man is...
Military facilities; Forts & fortifications; Aerial photographs
Dark aerial view photo from 1931 of Baker Road crossing Dixie Highway at Fort Knox, Kentucky. Fort Knox was known as Camp Knox until 1932. On back of image: "Photo taken on Baker Road crossing Dixie Highway near tip top[?]." Additional...
Intersection of two roads at a white building, possibly a gas station. The roads are the Interurban crossing U.S. 60. Signs near the building say "Standard Oil Products" and "Cottages." There is also a sign that says...
Railroad crossing of multiple train tracks at an intersection. Stores are on either side of the street. Near Hiawatha Avenue and Louisville Avenue. Title supplied by cataloger.
Railroad crossing of multiple train tracks at an intersection. A train is stopped on one set of tracks, but the gates are up. Near Hiawatha Avenue and Louisville Avenue. Title supplied by cataloger.
Seventh Street Road at the Southwestern Outfall crossing. Stretch of paved street with houses to the left surrounded by fields. A truck and car are parked on the right side of the road near a large pile of dirt. A man stands nearby.
Brooklyn Bridge as viewed from one end showing a train on railroad tracks, pedestrians on a path, and a road for carriages and wagons. Title: 4274 The Different Ways of Crossing Brooklyn Bridge. Text on left: C.H. Graves, Publisher. Philadelphia,...
View from below of railroad bridge crossing the Ohio River between Louisville, Kentucky, and southern Indiana. A man stands on the ground, and a train appears to be crossing the bridge. Caption: Louisville Ky. Great Railroad Bridge over Ohio River....
Railroad stations; Railroads; Union Station (Chicago, Ill.); Buildings; Bridges
Overhead view of Union Station in Chicago and the Chicago River. Two buildings are in the background with rows of train platforms in front. To the left is the Chicago River with a boat and barges visible. In the foreground is a bridge crossing the...
Address: 1316 W. Hill Street, Louisville, Kentucky. The exterior of the Jefferson Woodworking Plant features two sets of double doors providing access to the building, as does a loading bay which faces railroad tracks. A crossing gate abuts the...
Transportation; Rivers; Paddleboats; Louisville and Portland Canal (Ky.)
The paddleboat Ida-Mae out of Pittsburgh, Pennsylvania, moves down the Louisville and Portland Canal. A small sign on the shore indicates "U.S. Lock 41." A man walks along the fence line on the opposite part of the canal near a stone...
