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Showing items 1 through 9 of 37.
  1. Library Resource
    Reports & Research
    November, 1973

    The difference in kind between the pre-colonial and the postcolonial relations of production can he noticed through the gradual dissolution of relations based on a personal tieless gift-giving based on the market economy. The liberation of the labor forces this engendered and of channeled into a new system of constraint, led to the beginning of a private appropriation of land.

  2. Library Resource
    Conference Papers & Reports
    March, 1973

    The origins of the cadastre in Tunisia go back to the Roman occupation. The vestiges of a Roman cadastral system were first brought to light through examination of plans and topographical maps established from ground surveys; from this examination it was possible to determine the characteristics of both the orientation of the lines arid the dimensions of the grid.

  3. Library Resource
    Reports & Research
    April, 1973

    Black cotton soils are one of those clays with a high content of montmorillenite. These have a very high plasticity leading to high rates of expansion on wetting followed by shrinkage and considerable cracking on drying. The black cotton soils of Ethiopia have liquid limits ranging between 80 and 120 and plasticity indices of 40 to 80 (see figure l). The activity of these clays is between 0.8 and 1.5. Thus by the Skempton classification the activity of these clays is considerable and, as one would expect, swelling potential is high.

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