Making simultaneous observations with radio antennas continents apart, astronomers are getting information from space not available before. The technique can be used to obtain information related to many problems on earth also. (RH)

Describes the construction of an inexpensive habitat for maintaining amphibians in the classroom. (PB)

Techniques for detection and measurement of carbon monoxide (CO) in air are of interest and utility in many aspects of automotive safety. CO concentrations may range from less than 100 parts per million (ppm), or 0.01 percent, to about 10 percent by volume. Gas indicator tubes have been used for many years primarily as detectors of hazardous gases…

The sensor is a mass spectrometer system which continuously monitors the atmospheric constituents of hydrogen, water vapor, nitrogen, oxygen, and carbon dioxide, and monitors the Freons on a demand sampling basis. The manual provides a system description, operational procedures, and maintenance and troubleshooting instructions. Circuit diagrams…

The use of a trained sea lion to locate and attach a retrieval device to submerged instruments and test equipment is described. (CP)

Describes the author's visit to the Italian cities where Galileo lived. Discusses the legendary swinging Cathedral lamp and the Leaning Tower of Pisa. Describes the science apparatus used by Galileo and other men of science which appear in the Museum of the History of Science in Florence. Presents six pictures of items viewed within the museum.…