The Plants of Pennsylvania


Book Description

The second edition of The Plants of Pennsylvania is the authoritative guide to identifying the nearly 3,400 species of flowering plants, ferns, and gymnosperms native or naturalized in the Commonwealth. It features a complete reorganization into a genetic scheme that reflects recent advances in our understanding of plant relationships.




Phonetics, Theory and Application


Book Description







A Short History of Progress


Book Description

Each time history repeats itself, so it's said, the price goes up. The twentieth century was a time of runaway growth in human population, consumption, and technology, placing a colossal load on all natural systems, especially earth, air, and water — the very elements of life. The most urgent questions of the twenty-first century are: where will this growth lead? can it be consolidated or sustained? and what kind of world is our present bequeathing to our future?In his #1 bestseller A Short History of Progress Ronald Wright argues that our modern predicament is as old as civilization, a 10,000-year experiment we have participated in but seldom controlled. Only by understanding the patterns of triumph and disaster that humanity has repeated around the world since the Stone Age can we recognize the experiment's inherent dangers, and, with luck and wisdom, shape its outcome.