(Extended photo media series ; 2) On cover: The history and practice of photographic printing, 1840-1895. Preface Silverprinting has been often doomed, but it still survives. The Albumen and Salted Paper Book is a book about the major photographic printing processes in use during the years 1840-1895, approximately the first half-century of photographic history. These first 50 years of photograp...

IN 1969 the Association for Super vision and Curriculum Development held a special conference on the hidden or un studied curriculum of the school. My friend Philip Jackson organized the session with papers by Friedenberg, Dreeben, Jackson, and myself. 1 At the time I claimed Jackson's term, the "hidden curriculum," referred to the moral atmosphere of the school, and that the function of the hi...

This technical memorandum contains a compilation of several papers, reports and books relative to the GSM-900 radio interface. It is not exhaustive and it is restricted to the Tra c Channel/Full-Rate Speech (TCH/FS).

Enzymatic pretreatment of cellulose is generally considered to be a new area of research, but in fact it was a standard step in European preindustrial papermaking between 1300 and 1800. Specialized handmade papers are routinely prepared in our Center for use in the care and conservation of rare books and manuscripts. Our attempts to replicate some of the early papers have led us to an investiga...

The publication of this authoritative series of papers in two manageable volumes is a fortunate event. The reading public is already familiar with one or the other of the individual parts making up these books, and to praise them now would be anachronistic. They flow from a philosophical view which originated in the so-called Vienna Circle, of which several of the authors were original members....