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Nonartifactual Materials:
The record of what happens during a dig must be as complete as possible. As Sir Leonard Woolley pointed out, the smallest detail may be of vital importance, and if it is not recorded at once it may be lost forever. In addition to describing the artifacts, the workers must note any special features of the site itself, as well as any nonartifactual materials— bones, stones, plants—that may have been discovered. To assist in the recording, photographs are taken at each stage of the excavation.a General All materials subject to test and inspection, intended for use in boilers and machinery of vessels classed or proposed for classification, are to be tested and inspected by the Surveyor in accordance with the following requirements or their equivalent. Materials having characteristics differing from those prescribed herein require special approval for each application of such materials and the physical tests may be modified to suit conditions as approved in connection with the design.
The subunits themselves must either be pumped into the cell from the surrounding environment or fabricated from still simpler raw materials received from the environment. Therefore, the length of the lag phase is governed by the time it takes the cells to stock up on these critical supplies. If the nutrient medium is rich in the needed raw materials, the raw materials can be pumped quickly into the cell, and cell division can start promptly. If the nutrient medium is poor, the cells take a much longer time to store up the threshold concentrations of the necessary raw materials.
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