SÜRVEYING, MARINE AND SUBMARINE.
59
can then be set in an upright position until it is dry. In case the diver
urinates in the dress, it should be turned inside ont, washed with clean water,
and then allowed to dry.
“ Should the helmet have been lying by for some time, the valves must be
unscrewed and examined to see that they are free from verdigris; they may
be slightly greased with tallow, and new springs should be fitted if necessary.
All the screws of the helmet breastplate should be kept clean, and occasionally
wiped with an oily rag.”