Economics of Land Degradation and Improvement

Economics of Land Degradation and Improvement

This volume deals with land degradation, which is occurring in almost all terrestrial biomes and agro-ecologies, in both low and high income countries and is stretching to about 30% of the total global land area. About three billion people reside in these degraded...
The Elements of Animal Biology

The Elements of Animal Biology

This volume is intended as an introduction to the elements of animal biology for the use of students in the high school. The cut-and-dried method of exposition which is so commonly found in text-books and which so frequently deprives them of all traces of stimulating...
The Practical Astronomer

The Practical Astronomer

Light is that invisible etherial matter which renders objects perceptible by the visual organs. It appears to be distributed throughout the immensity of the universe, and is essentially requisite to the enjoyment of every rank of perceptive existence. It is by the...