The first direct evidence of pre-columbian sources of palygorskite for Maya Blue

Maya Blue, a nano-structured clay–organic complex of palygorskite and indigo, was used predominantly before the Spanish Conquest. It has fascinated chemists, material scientists, archaeologists and art historians for decades because it is resistant to the effect of acids, alkalis, and other reagents, and its rich color has persisted for centuries in the harsh tropical climate of southern Mesoamerica. One of its components, palygorskite, is part of modern Maya indigenous knowledge, and ethnohistoric and archaeological data suggest that its modern sources were probably utilized in Prehispanic times. Yet no direct evidence verifies that palygorskite was actually mined from these sources to make Maya Blue. Here we characterize these sources compositionally, and compare our analyses to those of Maya Blue from Chichén Itzá and Palenque. We demonstrate that the palygorskite in most of these samples came from modern mines, providing the first direct evidence for the use of these sources for making Maya Blue. These findings reveal that modern Maya indigenous knowledge about palygorskite, its mining, and its source locations, is at least seven centuries old.     

Poppy Politics: American Agents,Iranian Addicts and Afghan Opium, 1945–80

This paper surveys the history of American support for Iranian counter-narcotics policy between 1945 and 1989. In particular, it explores the general failings of Tehran's attempt to ban the domestic production and consumption of opium. The significance of this period is two-fold. First, this essay argues that American-backed efforts to combat the opium trade in Iran highlighted the detrimental effects narcotics had upon both state and society in Iran. Second, it suggests that the Iranian ban upon narcotics helped to stimulate a rise in Afghan opium production before the Soviet invasion of 1979.     

The Continuing Puzzle of Committee Outliers: A Methodological Reassessment

Crovitz, L. Gordon, and Jeremy A. Rabkin, eds., The Fettered Presidency. Washington: American Enterprise Institute, 1989. Pp. xx, 335; $14.95 softbound.

Jones, Gordon S., and John A. Marini, eds., The Imperial Congress. New York: Pharos Books, 1988. Pp. xi, 366; $24.95.

Reedy, George E., The Twilight of the Presidency: From Johnson to Reagan. New York: New American Library, 1987. Pp. 200; $4.50 softbound.

Seligman, Lester G., and Cary R. Covington, The Coalitional Presidency. Chicago: Dorsey Press, 1989. Pp. 191; $25.00 hardbound; $11.95 softbound.     

Violence and the politics of prestige: the fascist turn in colonial Libya

In 1922–1923, Fascist Party leaders hoped to define a sharp break from previous approaches to colonial rule and imperial expansion in Italy's Libyan territories. Mussolini's nomination of Luigi Federzoni, a leading figure of the Italian Nationalist Association, as the Minister of Colonies at the end of 1922 signalled a new era in Italian colonial administration focused on aggressive expansion and the institution of what was known as a ‘politics of prestige’. This definition of a fascist style of colonial rule appealed to the enthusiasm for violence among blackshirt militias and early fascist supporters in the Libyan territories. This definition of a fascist style of colonial rule, however, inspired immediate reaction from both colonial officials, with stakes in maintaining a measure of continuity and stability, and from those within the nascent Fascist Party who wanted to promote an alternative model of fascism in the colonies. This article examines contests to define fascism and fascist colonial rule in the Libyan territories through the employment of voluntary militias, the competing voices of Fascist Party outposts, and various programmes for the development of a colonial culture.     

‘Womanly Qualities’ and Contested Methodology: Gender and the Discipline of Economics in Late Imperial Germany

This article analyses the affinities between two debates of the 1890s in Germany: one over women's intellectual abilities and one over the production of knowledge in economics. Economists and advocates for women's higher education found common cause and language because of the rhetorical centrality of the working woman, family and motherhood to a social reform discourse that connected the university, the women's movement and the state. The historical economists conceptualised their ‘science’ in a way that allowed ‘womanly qualities’ to be identified as appropriate to its optimal practice. A limited comparison with the United States highlights the historical specificity of this construction of social‐scientific knowledge.     

Tectonic evolution of a Paleozoic thrust fault influences the hydrogeology of a fractured rock aquifer,northeastern Appalachian foreland

In polyorogenic regions, the superposition of structures during a protracted tectonic history produces complex fractured bedrock aquifers. Thrust‐faulted regions, in particular, have complicated permeability patterns that affect groundwater flow paths, quantity, and quality. In the Appalachian foreland of northwestern Vermont, numerous bedrock wells that are spatially related to the Paleozoic Hinesburg thrust have elevated naturally occurring radioactivity and/or low yields. The association of groundwater quality and quantity issues with this thrust was a unique opportunity to investigate its structural and hydrogeologic framework. The Hinesburg thrust juxtaposed metamorphic rocks of the hanging wall with sedimentary rocks of the footwall during the Ordovician. It was then deformed by two orthogonal Devonian fold sets and was fractured during the Cretaceous. Median well yields in the hanging wall aquifer are significantly lower than those of the footwall aquifer, consistent with the respective permeability contrast between metamorphic and carbonate rocks. For wells drilled through the Hinesburg thrust, those completed closest (vertically) to the thrust have the highest median yields, whereas others completed farther below have yields in the footwall range. The geochemical signature of the hanging wall and footwall aquifers correlates with their whole‐rock geochemistry. The hanging wall aquifer is enriched in alpha radiation, Na+K‐Cl, Ba, and Sr, whereas the footwall aquifer is enriched in Ca‐Mg‐HCO₃ and alkalinity. Wells that penetrated the Hinesburg thrust generally have hanging wall geochemical signatures. A simple hydrogeologic model for the permeability evolution of the Hinesburg thrust involves the ductile emplacement of a low‐K hanging wall onto a high‐K footwall, with subsequent modification by fractures.