A baby-food jar is the constant in this group of ten basic science experiments. (Editor)

After discussing the ease of using the Fry Readability Graph, the author applies it to biology, chemistry, and physics texts, and lists the results. He warns that textbook authors and classroom teachers should be aware of the potential impact that the reading level of a text can have on students. (KC)

Suggests a way of distinguishing between the two classes of chemical reactions of the lanthanide series. (CS)

This review article looks at the contents of a sample of science textbooks, not for their scientific contents as such, but for their hidden contents, in particular pointing out cases of hidden sexism. (Author/KC)

Described are some new uses and procedures of titration procedures. Topics included are titration in non-aqueous solvents, thermometric titration and catalytic methods for end-point detection, titration finish in organic elemental analysis, and sub-micro analysis and automatic titration procedures. (CS)

Reviews recent findings regarding the preovulatory surge of luteinizing hormone (LH) in the reproductive cycle. Diagrams and textual information are presented detailing aspects of the feedback loops involved in the hypothalamo-pituitary-ovarian axis. (CS)

Reviews calculations that derive an order of magnitude expression for the size of man in terms of fundamental constants, assuming that man satifies these three properties: he is made of complicated molecules; he requires an atmosphere which is not hydrogen and helium; he is as large as possible. (CS)

Reviews the application of orbital symmetry principles to an understanding of the fluxional behavior of certain organometallic compounds, with particular reference to the cyclopolyenylmetal systems. (CS)

Parents can do a lot to help children learn about science. Ten tips from experts suggest home activities, excursions, learning aids, and TV shows which can help children discover and enjoy science. (IAH)

Describes how teachers and students can construct a mass, spring scale, lever, and pulley. (ZWH)

Presents a series of quotes that give insight into the laboratory setting, experimental technique, and chemical interests of Sherlock Holmes. (GS)

Explains the distribution of air pollutants as related to such meteorological conditions as temperature inversions, ground inversion, and wind velocity. Uses a power station to illustrate the effect of some of the meteorological conditions mentioned. (GS)