This bulletin of the Scottish Schools Science Equipment Research Centre provides information to teachers on a variety of topics relating to the use of equipment in science instruction. The introductory remarks deal with some of the consequences of introducing package-deal science courses in underveloped countries and, in particular, discuss the introduction of Nuffield Combined Science in Iran. The section entitled "Biology Notes" provides a detailed examination of the criteria to be considered in selecting suitable microscopes for student and teacher use at all levels of secondary education. In the section dealing with chemistry, teachers are cautioned about the hazards of storing the explosive mixture of copper and sulfur powder. Tips are provided on the construction of simple science apparatus in the workshop, and brief notes inform teachers of equipment available from supply houses. (JR)