A visible sign of changing relations between the Global South and Global North are reparation claims for colonial injustice. An interesting case is the 1904–1907 Namibian Genocide. Germany has recently concluded a draft agreement with Namibia on reconciliation and compensation. Nevertheless, Germany maintains that it is not under any legal obligation to pay reparations. This article challenges that position, arguing that colonial international law was far too ambiguous to support this conclusion. For this purpose, the article contrasts this ‘conventional view’ of colonial international law with post-colonial and pluralistic approaches. Post-colonial approaches reveal colonial-era law as a deeply ambiguous, contradictory practice that mirrors the identity crisis of the colonizers. Pluralistic approaches juxtapose colonial international law with autochtonous views of inter-polity law, i.e., the normative framework governing colonial encounters. To reconstruct autochtonous views, the article draws on letters by Hendrik Witbooi and Maharero, traditional leaders from Namibia, and examines the contours of their inter-polity law relating to territorial sovereignty and warfare. These contending perspectives undermine the cogency with which the conventional view rejects reparation claims. While ambiguity as such does not give rise to compensation claims, other options come to mind, such as a duty to negotiate, shifts in the burden of proof – or a profound recalibration of international law towards greater solidarity.

One does not have to be a specialist in religious history or the science of symbols in order to yield to the fascinating variations on the meanings of the Holy Grail. This strange vessel was undoubtedly already imbued with secret traditions when from the end of the 12th century to the end of the 13th century it was briefly resplendent with all the glory conferred by legend, before disappearing into the semi-darkness of mystery until Wagner's Parsifal brought it back to light by drawing from it the redemption of the suffering inflicted by Schopenhauer's world.

The reduction and reoxidation of three nontronite samples, GAN (API H-33a, Garfield, Washington), SWa-1 (ferruginous Washington smectite), and NG-1 (Hohen Hagen, Federal Republic of Germany) were studied with visible absorption and Mössbauer spectroscopy. The intensity of the intervalence electron transfer (IT) band at 730 nm in these nontronites was monitored during reduction and reoxidation at 277, 294, and 348 K. The results showed that the intensity of the band followed the number of Fe(II)-O-Fe(III) groups in the clay crystal, increasing to a maximum at about Fe(II): total Fe = 0.4; upon complete reduction, the band decreased to about the intensity of the unaltered, oxidized sample. With reoxidation of the sample with O2, the intensity of the band increased sharply, followed by a gradual decay back to the original, oxidized intensity. The ultimate level of Fe reduction achieved was at least 92%. Concomitantly, the color changed from yellow through green, blue-green, dark blue, light blue, and light gray as the Fe(II) content increased. The GAN nontronite was more difficult to reduce than the SWa-1 or NG-1 samples. The rate and level of reduction increased with the amount of reducing agent added.

Petrographic observations indicate that dolomite, siderite, pyrite, Ti oxides, quartz, and K-feldspar formed as by-products of mica alteration during diagenesis of Jurassic reservoir sandstones of the Haltenbanken area (offshore central Norway). These minerals precipitated on a mica-grain scale or a thin-section scale. Modal analyses and mass-balance calculations of muscovite alteration to kaolinite and of biotite to kaolinite, illite, and chlorite suggest limited elemental mobility during sandstone diagenesis. The alteration of mica to kaolinite occurred in sandstones buried <2200 m deep (present temperature < 70°C), whereas illitization and chloritization of biotite occurred during burial to depths > 3000 m (present temperature >95°C).

An electrostatic model for the stability of clay tactoids (stacks of parallel clay platelets at ~10 Å separation) in an aqueous solution has been developed. The counter ions located in the interstitial water layers are assumed to be in equilibrium with the bulk solution. Generally, the counter-ion charge density is slightly different in magnitude from the platelet charge density. Approximating the discrete charges by homogeneously charged planes, a one-dimensional potential distribution can be calculated. From this the Gibbs energy of electrostatic interaction (using single platelets as a reference) can be computed. The model predicts that clay minerals with high (vermiculite, mica) and low (pyrophyllite, talc) degrees of cationic substitution form stable tactoids. For smectites, charge density, electrolyte concentration, and counterion species determine the swelling characteristics. At a particular charge density, lower valences of the counter ions and lower electrolyte concentrations lead to increased swelling. If tactoids are formed, the number of platelets is governed by a dynamic equilibrium between electrostatic forces, van der Waals forces, and external forces, such as shear forces due to hydrodynamic flow.

Although numerous, small, manganese oxide deposits associated with dolomite in the Eastern Transvaal escarpment, Republic of South Africa, have been known for many years, their mineralogical make-up is somewhat controversial. Chemical, mineralogical, and morphological properties of the weathering products of dolomite and the coexisting manganese oxide material in the Graskop area were therefore determined. Mn and Fe occur only in minor accessory minerals in the original rock; however, in the weathering residue, these elements are concentrated and occur as separate mineral phases, chiefly birnessite, nsutite, and goethite. Thin veins of pure muscovite and quartz traverse the residua. Rare, pure calcite and maghemite nodules were noted throughout the residual manganese material. The properties of this weathering sequence suggest that the manganese wad deposits were formed in situ as a result of the congruent dissolution of dolomite, leaving a porous, sponge-like structure, highly enriched in Mn and Fe oxides.

“The world of life which is comprised of the lithosphere, the hydrosphere and the atmosphere”: this definition of the biosphere is not complete since it does not express the determining influence of living organisms on its composition, on its structure and on the processes of its continuing evolution. The part of living matter in the biosphere is relatively small (about 0.25%), but this part has a considerable influence on its structure.

The biosphere should be considered as the universal source of all food products without exception. Mankind's ability to feed itself depends on the productivity of this biosphere in the first place. Moreover, its condition determines not only the quantity but also the quality of nourishment. The problem is a critical one today because of the increasing pollution of the biosphere by products poured into it by various human activities.

Every civilized society treasures through its folk tales and folk myths the elements of its native tribal life as points of cultural reference. The tribe not only acts as a foil to our culture, but also sustains its very being and gauges the degree of progress and change in the civilization that we uphold. This interdependence has a vital force: insofar as civilized societies define themselves by the distance they have built up between themselves and their respective primitive societies, a civilized culture without its indigenous tribal past risks the authenticity of its process of change to challenge and doubt. Hence, our adulation of distance in both time and space between ourselves and our tribal forefathers, and our eagerness to recognize, maintain, and even glorify our tribes—a necessary syllogism in our postulation of a self-preserving argument. In a peculiarly chiastic way, we thrive on our existential reliance on the very primitiveness that we seek to repudiate as characteristic of a world past. We celebrate our present by eulogizing our past, and to fit the tribes in the large scheme of our self-definition we iconize them. These idealized images hide a creative mask through which we embrace the romantic myths of our respective origins and progress; the parades we arrange for our tribal history—through performance on our streets, or through semantics in our literature—subtly embody this dependence.

Cacoxenite having the composition (Al4.0Fe22.5O7.1(OH)14.3(PO4)17(H2O)23.7)·50.3H2O was identified in a bed of mature quartz sand in the Miocene Calvert Formation near Popes Creek, Maryland. This is the first reported occurrence of this mineral in Atlantic Coastal Plain sediments north of Florida. The cacoxenite occurs as silt-size to sand-size grains, both as irregularly shaped aggregates and as radiating arrays of delicate acicular crystals. The presence of discrete cores and overgrowths in some grains indicates at least two generations of crystal growth. Electron microprobe analyses reveal excess Si and Al (relative to the ideal composition), which is believed to reflect ultra-fine clay particles within the cacoxenite grains. Admixed clays probably served as a substrate for the formation of ferric oxyhydroxides, which were subsequently converted to cacoxenite through the addition of dissolved phosphorus.

The hydrothermal synthesis of kaolinite was examined in the Al2O3-SiO2-H2O system to study inhibitory effects of additional ions on the formation of kaolinite. Syntheses were carried out with amorphous starting materials and salt solutions of various concentrations in Teflon pressure vessels at 220°C for 5 days. The reaction products were characterized by XRD, IR, DTA-TG, NMR and TEM. In all of the runs using solutions with cation concentrations less than 0.001 M, no significant effect on the formation of kaolinite was observed. The inhibitory effect of the univalent cations Li+, Na+ or K+ was less than that of divalent cations such as Mg2+ or Ca2+. The addition of trivalent Fe3+ or excess Al3+ ions interfered with the formation of kaolinite significantly. Sulfate and acetate solutions interfered with the formation of kaolinite more than chlorides and nitrates. No crystalline product was obtained using a 1.0 M basic solution of carbonate or hydroxide. The addition of the lithium ion to the system affected the crystallization of kaolinite only slightly. The use of 0.1 M LiCl and LiNO3 solutions for the syntheses improved crystallization of kaolinite along the [001] direction.

At a time when there is general speculation about civilization, or civilizations, as well as on what the relationships are between Western and other civilizations, it is logical to try to define precisely what the men of ancient Greece thought about the question, since Western civilization owes so much to them.

It may be that they did not think about it at all, or at least they thought nothing that could be expressed in modern terms. The fact is that ancient Greece did not have a word for civilization: the French and English words come from Latin, not from Greek, while the first examples given in French and English dictionaries are the privileged example of Greece, “the civilization of Greece.” Did the Greeks use a paraphrase? Or a different word? If we consult a English-Greek dictionary we are surprised to see that the word given for “civilized” is hèmeros) that is, “docile,” “tamed.”

In economic theory it is circumstances that dictate fashion. During the last quarter of the century, years marked by an unprecedented escalation of material production, economists of all persuasions, neoclassicals or Marxists, accorded an important place to theories of growth. Economic reductionism being fundamental, development was likened to growth, which tends to take pars pro toto and to ignore the difference between a necessary condition and a sufficient one. Suddenly economic theory, to which mechanical formalization would confer the appearance of an almost scientific rigour, became a powerful argument for the ideology of growth.

Aleksandr Pushkin (1799-1837) occupies a special place in the development of Russian culture. He was at the same time a great poet, the reformer of Russian literary language, a historian and a political thinker. In the enormous mass of work devoted to Pushkin, a certain number of articles are concerned with his ideas on economics and the reflection of socio-economic problems in his writing. Until now, however, this theme has been studied in only a fragmentary way and less from the point of view of the professional economist than from that of a literary historian. In an attempt to enlarge and complete the idea we may have of Pushkin's economic views, I propose also to show the importance the politico-economic thought of Western Europe had for his work. One person comes to the fore when we study the subject from this angle: Nikolai Turgenev, a Decembrist, one of the “masters” of the poet's youth, who played an important role in the rapprochement of Russian and Western European cultures.