Tocci, Salvatore

A biography of the American doctor and medical researcher who helped to develop successful influenza and polio vaccines, then turned his attention to vaccines for cancer and AIDS prevention.

A biography of Alexander Fleming, the discoverer of penicillin.

Provides information about lenses, looking at how they work in the eye, and in eyeglasses, and presents a series of experiments and investigations that can be done with a hand-held magnifying lens.

Describes the properties of zinc, explains what zinc alloys are, and discusses several things that zinc, zinc compounds, and zinc alloys are used to make, including rubber tires, pennies, and sunscreen; and presents related experiments and an annotated list of Web sites.

Presents an introduction to sodium, in simple text with illustrations, including explanations of what it is, how it was discovered, why the human body needs it, and more.

Presents an introduction to silicon, in simple text with illustrations, including information on what it is made of, how it is used, and where it is found.

Presents an introduction to mercury, in simple text with illustrations, providing information on what it is, how it is useful, and how it can be a poison.

Presents an introduction to lead, in simple text with illustrations, providing information on what it is, how it is useful, and how it can be a poison.

Presents an introduction to chlorine, in simple text with illustrations, including information on what it is made of, how it is used, and how it affects the environment.

Describes tin, where it comes from, and the many ways it can be used.