The author taught general science and physics at the high school level for 25 years. His talent for clear exposition and organization is evident. In his suggested 25 light experiments and the more than 45 dealing with machines and matter, his instructions are brief and his preceding comments anticipate the inevitable questions. The equipment for experimentation is kept simple and most important, inexpensive. Together, the two books provide an excellent active introduction to beginning students in physics. Separately or together, they are basic books for all tinkerers who wish to proceed from certain known to the unknown or untried. They are also godsends to students, and student teachers who have been ordered to demonstrate. The illustrations by Frank Aloise are given generous space. These are neat, exact visualizations of the procedures recommended in the text.