[5 phot. de l'élevage du nandou en France par la Société nationale d'acclimatation de France, phot. de L. Delaporte de Melun, don du baron J. de Guerne en 1897]

Donateur : Guerne, Jules de (1855-1931)

[Phot. de la couronne du soleil, avec lettre d'envoi par le baron N. Raulbars au prince Roland Bonaparte, Helsingfors, 28 mai 1897]

Donateur : Bonaparte, Roland (1858-1924)

[Notice sur la chapelle commémorative de l'incendie du Bazar de la Charité, rue Jean Goujon, 1897 (4 p. avec 2 phot.), des collections du prince R. Bonaparte]

Donateur : Bonaparte, Roland (1858-1924)

A Review of Urban Geocoding,1973.

The purpose of this report is to describe and evaluate recent efforts in spatial referencing problems and to assess the utility of the developments for urban research, particularly. and to speculate on future developments in the field attempting to structure the issues and review literature and directions of what has become known as "geocoding."

Incursiones en Occidente: comentarios a una ponencia del Dr Maluquer de Motes en Santiago de Compostela (1973)

Lo primero que hay que señalar es que siendo episódica la dedicación del autor al estudio de la Cultura Castreña del Noroeste (Maluquer, 1954; 1970; 1973A Y B; 1975), algunos de sus trabajos, en especial el documentado estudio en la Ha de España dirigida por Menéndez Pidal y el que es objeto de nuestro análisis, constituyeron hitos en el estudio del mundo castreño.

An Investigation of Portland Cement Concrete Utilizing 70% Class V Aggregate and 30% Calcareous Coarse Aggregate, R-255, 1973

The main sources of coarse aggregate for secondary slip form paving in Southwest Iowa exhibit undesirable "D" cracking. "D" cracking is a discoloration of the concrete caused by fine, hairline cracks. These cracks are caused by the freezing and thawing of moisture inside the coarse aggregate. The cracks are often hour glass shaped, are parallel to each other, and occur along saw joints. The B-4, a typical secondary mix, utilizes 50% fine aggregate and 50% coarse aggregate. It has been proposed that a concrete mix with less coarse aggregate and more fine aggregate might impede this type of deterioration. The Nebraska Standard 47B Mix, a 70% fine aggregate, and 30% coarse aggregate mix, as used by Nebraska Department of Roads produces concrete with ultimate strengths in excess of 4500 psi but because of the higher cost of cement (it is a six bag per cubic yard mix) is not competitive with our present secondary mixes. The sands of Southwest Iowa generally have poorer mortar strengths than the average Iowa Sand. Class V Aggregate also found in Southwest Iowa has a coarser sand fraction, therefore it has a better mortar strength, but exhibits an acidic reaction and therefore must be·used with limestone. This illustrates the need to find a mix for use in Southwest Iowa that possesses adequate strength and satisfactory durability at a low cost. The purpose of this study is to determine a concrete mix with an acceptable cement content which will produce physical properties similar to that of our present secondary paving mixes.

Feasibility Study of Dynamic Overload and Ultimate Load Tests of Full-Scale Highway Bridges, HR-160, 1973

As a result of the construction of the Saylorville Dam and Reservoir on the Des Moines River, six highway bridges are scheduled for removal. Five of these are old high-truss single-lane bridges, each bridge having several simple spans. The other bridge is a fairly modern (1955) double 4-span continuous beam-and-slab composite highway bridge. The availability of these bridges affords an unusual opportunity for study of the behavior of full-scale bridges. Because of the magnitude of the potential testing program, a feasibility study was initiated and the results are presented in this two-part final report. Part I summarizes the findings and Part II presents the supporting detailed information.