Provides simple instructions for establishing an herbarium, in which the collecting and classifying of dried plants preserves a vital record of the status and variety of the flora found within particular locations at specific times. (Author/JJK)

Provides construction details for a simple reflectometer that can be utilized for the observational technique known as reflectance spectroscopy. Includes background discussion, applications, calibrating techniques, and typical results. (JJK)

Provides the electronic circuit schematic for the construction of a green vegetation sensor, the directions for its use, and suggestions for student projects. (JJK)