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Der Erste: Ein kontinuierlicher Rückgang der Nutzbarkeit und der Nutzung von Ackerböden für den Pflanzenbau. Nach Paul Buringlo, Landwirtschaftsexperte der FAO/Welternährungsorganisation, werden die nutzbaren Bodenvorräte der Erde auf 100 Jahre, die der USA auf 20 Jahre... Read More

It was pointed out by Rudolf Steiner that diffential equations governing the »four ethers« can be derived by modification of differntial equations of the flow of heat in solids. In this paper, the latter ist compared to one that would apply to the »chemical ether«. Ways are... Read More

In the course of a project aiming at a synopsis of the sweet grasses (poaceae), certain methodological questions urged their analysis. This paper describes the path which led the author in her considerations. A central principle of Goethe illuminates the problem on hand: The... Read More

The following is an attempt to reach an understanding of the formation of poisonous substances in hemp (Cannabis sativa), hop (Humulus lupulus) and stinging nettle (Urtica dioica). These three plants are closely related; they belong to the group of the Urticales. All three... Read More

The problem of making biological-dynamic preparations in climates where the recommended 6 plants do not grow readily is outlined. If a certain plant is to be replaced by another one the original species must be known thoroughly. Moreover the coherence in their mutual... Read More

The cytoplasmic scaffold. Recently published notes by Rudolf Steiner concerning cytoplasmic structure and its significance for a «cosmological» understanding of the cell, as well as related excerpts from several lectures, are brought together with what has been learned about... Read More

Experiments are reported on in search of the effect of sychronized orientation to the zodiac on the growth of plants. In consecutive stages of the project the apparatus (astrostat) was modified. A description of the technique is given. Two experimental approaches were carried... Read More

The relation between the different varieties of the false-oat-grass meadow (arrbenantheretum elatiornis) and their respective environments is investigated in a study comprising the following methodical steps:

- The integral impression of a chosen variety is... Read More

Different types of vortices are introduced. They are found in nature or can be produced artificially in ways described here or in modifications thereof. In such vortices layers of fluid glide over each other, leading to shear, rotation and diffenences in pressure. Each type... Read More

In his writing on natural science and in his lectures Rudolf Steiner frequently referred to certain substances in unusual terms. Matter is understood as a consequence of processes instead of their cause. Thus, they manifest imprints of higher forces and beings in well defined... Read More

An attempt has been made to describe the development of the brown grass frog, Rana temporaria, in correspondence with the environment in which it takes place. The investigation has shown the development proceeding in three distinctive steps: embryonic development is best... Read More

Coloured Wings are the major manifestation of butterflies. In the present article a methodological approach is described to grasp the context of this phenomenon, on the basis of observations by Suchantke (1974, 1976). After eclosion from the pupa the colours of the wings are... Read More