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Incidental Protection Derived: The serious check which this industry received during the Civil War was not forgotten upon the declaration of peace. Lands there were in plenty, but there was no money to operate them, and it was not until incidental protection derived protection was derived from the tariff that any vigorous attempt was made to rehabilitate the old plantations. Since that time the greatest advancement has been made in Louisiana, and, during more recent years, in Texas.
Administration and Controls.—The standards of length and mass are fundamental. From these and the unit of time nearly all other standards are derived, either directly or indirectly. The production of copies, multiples, and subdivisions of the fundamental standards of weights and measures, the construction of the derived standards, and the comparison of the standards used in scientific work, manufacturing, and commerce, with the fundamental or derived standards of the government, are functions of the National Bureau of Standards in the United States and of similar bureaus in other countries.
Instruments for Personnel Protection.—In order to provide maximum protection to personnel from the hazards of excessive nuclear radiation, three types of monitoring procedures are used in regions where exposure is likely; these include area monitoring, survey monitoring, and personnel monitoring.
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