Magnets Adler, Irving Popularity → Current 12 Peak 45 Niche 65 An introductory discussion of magnetism and the various kinds of magnets found in nature. Dobson 1969 50 pages
Machines Adler, Irving Popularity → Current 12 Peak 45 Niche 65 Discusses machines ranging from such simple ones as the ramp and the crowbar to prime movers which can be powered by atomic energy. Dobson 1967 50 pages
Light in Your Life Adler, Irving Popularity → Current 12 Peak 42 Niche 62 Dennis Dobson 1961 142 pages
Directions and angles Adler, Irving Popularity → Current 8 Peak 35 Niche 55 Dobson 1972-07-31 49 pages
