The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 436
th com-plete success. It will be at once seen that the simple stem which holds up the mirror canbe raised or lowered, so that it may be used either sitting or standing; thatthe mirror itself can be turned to the right or the left, and set at everypossible angle : and it is also obvious that the…
Architecture · Civil engineering · Science
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