A conjunction of Saturn and Jupiter which occurred in 7 B. C. is proposed as a possible explanation for the Christmas star. (CP)

Sixteen Texas libraries, in June 1969, founded the Texas Consortium to Microfilm Mexican Archival Resources in a cooperative effort to preserve Mexican records for research. Members of the Texas Consortium choose an area of Mexico in which they wish to work, and the Consortium coordinates activities. (7 references) (Author/NH)

Cohesion and gravitational force are given as the mechanisms by which the siphon works. Hydrostatic theories and experimental results are given to support this conclusion. (TS)

Legal regulations of thermal pollution caused by the introduction of waste heat into our water resources and the potential of this energy as a future resource are discussed. (CP)

A list of names and addresses of companies able to supply science teaching aids to Australian science teachers. (AL)

This article lists sources of business education equipment such as adding machines, shorthand labs, and audio-visual aids. (JS)

The development of modern theoretical cosmology is presented and some questionable assumptions of orthodox cosmology are pointed out. Suggests that recent observations indicate that hierarchical clustering is a basic factor in cosmology. The implications of hierarchical models of the universe are considered. Bibliography. (LC)

The question raised from the study is this. "Why not give consideration to the establishment of Regional Instructional Resource Centers with staff to promote and coordinate productional activities, to manage reproductional processes, and to advertise and distribute instructional resources more widely and, thereby, elevate this important…