The refraction of the eye. A manual for students.

Mode of access: Internet.

Analysis of coastal sediment transport processes from Wrightsville Beach to Fort Fisher, North Carolina /

A comprehensive engineering analysis of the coastal sediment transport processes along a 42-kilometer segment of the North Carolina shoreline from Wrightsville Beach to Fort Fisher is presented. Included in the analysis is an interpretation of the littoral processes, longshore transport, and the behavior and success of beach nourishment projects at Wrightsville Beach and Carolina Beach, North Carolina. The historical position of the MLW, MSL, and MHW contours, relative to a fixed base line, is plotted for the period between 1964 and 1975. An equivalent volumetric erosion or accretion between successive surveys is determined by multiplying the average excursion distance of the contours by a constant of proportionality. The plots of excursion distance versus time for the MLW, MSL, and MHW contours also show the time response of the beach fills. This response is described by a mathematical function. The alongshore components of wave-induced energy flux are also determined within the study area through wave refraction analysis. This information, together with the information on volumetric change, is used in a sediment budget analysis to determine the coefficient of alongshore sediment transport and the inlet trapping characteristics. (Author).

A numerical model for predicting shoreline changes /

A mathematical model for long-term, three-dimensional shoreline evolution is developed. The combined effects of variations of sea level; wave refraction and diffraction; loss of sand by density currents during storms, by rip currents, and by wind; bluff erosion and berm accretion; effects of manmade structures such as long groin or navigational structures; and beach nourishment are all taken into account. A computer program is developed with various subroutines which permit modification as the state-of-the-art progresses. The program is applied to a test case at Holland Harbor, Michigan. (Author).

Interaction of waves and currents /

This report presents an overview of wave-current interacion, including comprehensive review of references to significant U.S. and foreign literature available through December 1981. Specific topics under review are the effects of horizontally and vertically varying currents on waves, wave refraction by currents, dissipation and turbulence, small- and medium-scale currents, caustics and focusing, and wave breaking. The results of the review are then examined for engineering applications. The most appropriate general-purpose computer program to include wave-current interaction is the Dutch Rijkswaterstaat program CREDIZ, which is based on a parabolic wave equation. Further applications include wave and current forces on structures and possibly sediment transport. The report concludes with a brief state-of-the-art review of wave-current interaction and a list of topics needing further research and development.

Untersuchungen über die astronomische Refraktion.

Mode of access: Internet.

Voyage de la Louisiane, fait par ordre du roy en l'année mil sept cent vingt : dans lequel sont traitées diverses matieres de physique, astronomie, géographie [et] marine : L'on y a joint les Observations sur la réfraction ... Divers voyages faits pour la correction de la carte de la côte de Provence et des Reflexions sur quelques points du sistème de M. Newton /

Las h. plegadas: "Observations de la variation de l'aiguille aimantée, faites pendant le voyage des Vaisseaux du Roy le Toulouse & le Henry à la Louisiane, dans l'année 1720" (p. 238). "Table pour la comparaison de la variation observée dans le voïage de la Louisiane en 1720 ..." (p. 244). El resto de las h. pleg. acompañan las "Observations sur la refraction, faites à Marseille", con paginación propia.

Ueber die wirkung der astronomischen strahlenbrechung auf beobachtungen mit dem kreismikrometer ...

Inaug.--diss.--Göttingen.

Recueil d'observations astronomiques, d'opérations trigonométriques et de mesures barométriques, faites pendant le cours d'un voyage aux régions équinoxiales du Nouveau continent, depuis 1799 jusqu'en 1803,

Mode of access: Internet.

Dioptrik, oder, Anleitung zur Verfertigung der Fernröhre /

Plate printed on double leaves.

Recherches sur les réfractions extraordinaires qui ont lieu près de l'horizon,

Mode of access: Internet.

The physiology of vision with special reference to colour blindness.

Mode of access: Internet.