Three hundred years ago, this English double-barreled air pump on a walnut stand was high tech and essential for its inventor's seminal work, Francis Hauksbee's Physico-Mechanical Experiments. It joins resonators, astrolabes, the earliest microscopes and scores of other devices, as elegant as they were revolutionary, in Gerard L'E. Turner's delightful testament to human ingenuity, Scientific Instruments 1500–1900: An Introduction (University of California, $138).
Connect With Us:
ANIMATION: Hydrangea Colors: It’s All in the Soil
The Hydrangea macrophylla (big-leafed hydrangea) plant is the only known plant that can 'detect' the pH level in surrounding soil!
One of the world’s most popular ornamental flowers, it conceals a bouquet of biological and biochemical surprises. The iconic “snowball” shaped hydrangea blooms are a common staple of backyard gardens.
Hydrangea colors ultimately depend on the availability of aluminum ions(Al3+) within the soil.
To view all multimedia content, click "Latest Multimedia"!
An early peek at each new issue, with descriptions of feature articles, columns, and more. Every other issue contains links to everything in the latest issue's table of contents.News of book reviews published in American Scientist and around the web, as well as other noteworthy happenings in the world of science books.
To sign up for automatic emails of the American Scientist Update and Scientists' Nightstand issues, create an online profile, then sign up in the My AmSci area.