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Type Of Office Maintained:
REFERENCE AND RESEARCH BUREAUS, or SCHOOL RESEARCH BUREAUS, a type of office maintained in connection with the office of superintendent of schools, the functions of which are (1) to prepare statistical data from current reports to keep the superintendent informed as to the work of each school in the system, the relative standing of the schools and grades in educational accomplishment, and the cost of operating the system; (2) to act as a clearing-house of current information, bringing the experience of other systems to the attention of local authorities; and (3) to conduct standard classroom measun merits and other research work as will aid tt superintendent and his supervisors in their ac ministrative work.A hive of bees is one of the simplest habitats to establish and maintain, especially for a schoolroom. The essential requirement is to obtain the correct type of demonstration hive. The hive should be constructed on the plans of a commercial hive since this type is the most easily maintained.
In making a brake application with vacuu suspended equipment, air is admitted to one sic of the piston while vacuum is maintained at tl other. Maximum speed at application is thus ei sured and time lag becomes negligible. In certain installations, diaphragm type powf chambers are used, rather than piston type cylir ders. Operation of the two types is identical bi construction differs because a Flexible membran or diaphragm is used in the former, whereas rigid sliding piston is used in the latter.
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