TECHNOLOGY AND CULTURE Book Reviews 171 out for study. He pays scant attention to the economic and occupa tional backgrounds of trailer owners, the negative reaction of many communities to the hordes of “trailerites” at their door, and the confusion over the trailer’s legal status as either a vehicle or a house. More should have been said about communities’ response to the trailer invasion, which took the form of zoning laws, regulation of length of stay and sanitation, and imposition of fees and taxes to pay for local services. State regulation of trailer camps and trailer components—brakes, hitches, and lighting—also begs for treatment. Thornburg does devote part of the book to an analysis of the psychological roots and social implications of trailer life, focusing on traditional American values that trailer life violently contradicted: home, family ties, accumulation of material possessions, privacy, regional loyalty, restful retirement, and the work ethic. But he does not explain what drove some Americans to forsake these values and become itinerant trailer dwellers, nor does he explain how trailer design and technology evolved to serve the needs of itinerants in various circumstances and economic strata. The trailer revolution was a complex phenomenon that involved many motives and many classes of people, from wealthy pleasure seekers to poor Americans seeking only to survive. This revolution spawned a new type of vehicle and a new type of housing, both of which are still prevalent, though in vastly different forms. The birth of the trailer movement deserves as much scholarly attention as the adoption of the automobile itself. Thornburg has done some homework and has produced a casual narrative, a “good read” that skims over the subject, hitting some points and missing others. It is an exploratory book that adds some useful facts to the body of information about trailers but leaves the reader wanting to know more. Roger B. White Mr. White is responsible for automotive history at the National Museum ofAmerican History. He is working on an illustrated history of motor homes and camping trailers. The Portable Radio in American Life. By Michael Brian Schiffer. Tucson: University of Arizona Press, 1991. Pp. xvii + 259; illustrations, bibliography, index. $45.00 (cloth); $24.95 (paper). Rarely has the uncertain process by which a particular type of consumer product assumes a succession of contradictory forms been so clearly traced as in this history of the portable radio from 1890 to 1965. Michael Brian Schiffer is an archaeologist who believes that everyday objects best reveal the life of an era; he also happens to be a radio “buff” in the best sense of that word. He illustrates his study with photographs of dozens of radios from his 172 Book Reviews TECHNOLOGY AND CULTURE own collection (meticulously identified and dated), as well as scores of images from trade journals and advertisements. His account is based on detailed knowledge of the technical development of radio and on a lively, risk-taking awareness of cultural factors involved in shaping that development. While tracing the hesitant, often unintentional, frequently broken line ofdevelopment running from the awkward field sets ofWorld War I to the pocket-sized transistor radios of the late 1950s, Schiffer in tegrates an impressive array of disparate material—biographical sketches of Maxwell, Tesla, Marconi, and Hugo Gernsback; electrifi cation of the home; emergence of mass production and distribution; outlines of the consumer culture between the world wars; amateur radio and the radio craze of the 1920s; development of broadcasting and changes in its formats over the years; the shrinking of radio sets during the Depression (to save on materials) and the primacy of radio as a medium at that time; civilian applications of military technologies from World War II; competition from television; development of subminiature tubes and transistors; the impact of the baby boom, suburban life, youth culture, and rock ’n’ roll on broadcasting and the size ofradios; and varying responses to competition from theJapanese. Schiffer maintains throughout the book a hands-on mastery of his material and a smooth, witty style that effortlessly clarifies complex subjects. He remains keenly aware of such small but crucial details as innovations in batteries and the comparative costs (related to average wages) of...