Describes effects which produce the semidiurnal tidal bulges, using elementary methods, without reference to fictitious forces and without recourse to a potential. (Author/HM)

Discusses certain pitfalls regarding the uncertainty relation between angular momentum and the angle variable from a pedagogic point of view. Further, an uncertainty relation has been derived for these variables in a simple and consistant manner. (Author/HM)

Presents a general treatment of scalar diffraction theory and discusses some concepts which yield new insight into the phenomena of diffraction throughout the whole space in which it occurs. (Author/HM)

Describes the history of arsenic, the properties of arsenic, production and uses of arsenicals, arsenic in the environment; toxic levels of arsenic, arsenic in the human body, and the Marsh Test. (BT)

Materials designed for teachers and handicapped children in the least restrictive settings are reviewed. Brief descriptions are given for materials on science instruction; arts and humanism; expressive arts; social studies units incorporating dance, music, and the visual arts; and functional and basic skills. (CL)

Discusses how the topic of surface water waves can be used in an introductory physics course. Applications in marine science are described. Formulas and activities using a ripple tank are discussed also. (CS)

Two demonstrations are described: (1) a variant of preparing purple benzene by phase transfer catalysis with quaternary ammonium salts and potassium permanganate in which crown ethers are used; (2) a corridor or "hallway" demonstration in which unknown molecular models are displayed and prizes awarded to students correctly identifying the…

The separation by high performance liquid chromatography of five common dyes from foods containing "artificial color" is described. (CS)

Describes a new publication, "Exploring Careers," which offers readers a way of relating their own interests to the demands of different careers. Emphasis is on "hands-on" activities. Aimed at junior high students, the book contains games, vocabulary lessons, and descriptions of particular jobs in 14 occupational clusters. (Purchasing information…

Describes three basic mechanisms of photosynthetic carbon dioxide assimilation in terrestrial higher plants. A few examples of each type are also included. (HM)

Explains problems and opportunities facing the educational historian who attempts to incorporate history of childhood and family life into the history of education offerings in faculties of education. (Author/DS)

Describes a selection of 25 books and articles for the teacher of the JH/MS (junior high/middle school) student. (DD)

Suggests ways to involve working parents with the early childhood education programs in which their children are enrolled. (MS)

Surveys the literature, curricula, materials and resources relating to Aerospace Education. Suggests methods for development of curricular materials, resource banks, and teaching and inservice resources. (CS)

Describes a selection of audiovisual aerospace materials available from government and non-government sources. (MLH)