Describes a method for modifying a four-function pocket calculator so that it can be used as a pulse counter. (SL)

Provides a brief description of the physiology of the human ear. The effect of sustained noise levels on hearing loss is discussed, as well as the establishment of maximum noise levels for American industries. (CP)

Provides the theory behind the construction of a classroom seismograph. Data obtained from such a device is presented. (CP)

Skills for living are not a frill. Kids learn basis and have fun with survival stations. (Editor)

Describes a chemistry laboratory activity for determining the best procedure for analyzing iodide in seaweed. (SL)

Describes a method of determining the molecular weight of a weak acid. (SL)

Describes experiments and apparatus used to study the interaction of falling water drops on water surfaces and the collision between pairs of drops. (SL)

Includes methods for determining melting and boiling points, illustrating the Finkelstein reaction, choosing acid-base indicators, growing perfect NaC1 cubes and "whiskers," bromination of alkenes, using vanadium in the laboratory, preparing phenylamine-copper (II) sulfate (VI) complex, simulating first-order chemical kinetics on a programmable…

Includes methods for demonstrating Schlieren effect, measuring refractive index, measuring acceleration, presenting concepts of optics, automatically recording weather, constructing apparaturs for sound experiments, using thermistor thermometers, using the 741 operational amplifier in analog computing, measuring inductance, electronically ringing…

Includes methods for using harmonographs in demonstrating motion of pendulums, constructing an electrostatic "bell," inverting mirror images, demonstrating the corrosion rate of steel, demonstrating expansion, studying rate of reaction between magnesium and hydrochloric acid, using matchboxes in science for containers, problem boxes, building…

Describes an experiment for determining the blackbody radiation constant hc/k, utilize a conventionally built cavity and a single-beam, single-window Perkin-Elmer 12-C model spectrometer. (SL)

A report is made of a study tour to Europe and Japan. The status of language laboratories and audiovisual education is discussed and machinery and methods described. (RM)

A rebuttal is made to an article entitled "The Case Against the Conventional Language Laboratory" by John R. Allen ("System," Vol. 2, No. 1). Arguments made in that article against the language laboratory are outlined and discussed. (RM)

Describes a method of bottle cutting. The bottle is filled half full of motor oil and a heated iron rod is inserted into the oil. (SL)

With the development of sophisticated techniques in the biology of conception, fetal research, sustaining life after functional death, and abortion, legal and ethical questions face the medical community. (JD)