10 EuRTON^ on a Portable Revolving Table. 
upon an ordinary table has the advantage of enabling the 
exhibitor to have various things lying at hand, while the 
microscope is being passed round to others. 
In constructing this my object was to have a table 
efficient, at the same time small and light, one which might 
conveniently accompany the microscope even on visits into 
the countr}^ Care was taken to have the space needed for a 
first-class instrument, and lamp, with bulPs-eye and side 
condenser; securing this, there is space for everything 
else. 
The upper part is in five sections, tapering from 3^ inches 
to a point, of deal ^ inch thick, made strong by having 
American leather-cloth glued on the upper and coloured 
cotton on the under surface, both being arranged to allow 
the parts to fold up like a fan. This rests on a triangular 
frame of 19 inches, made of light, tough wood, ^ inch deep 
by -V inch, Avith one bar across the middle. This bar is 
joined to the sides by two small pins at each end. The sides 
are united by a joint similar to that of a carpenter^s rule, 
but made of simple plates of brass, one above, one under- 
neath, as shown in Diagram 2. In the under one is a hole 
for the pivot, on which the table rests and revolves. The 
other angles are mortised, and held together by one of the 
two wires which give support to wheel-rollers. These wheels 
(about li inch diameter) are somewhat tapered, to move 
more smoothly in a circle, and are covered with cloth. The 
pivot J a small wire, is fixed in a turned base. This being 
placed in the middle of a round table, or near the end of a 
dining table, and the pivot-hole passed over, the whole is 
moved easily round, without damage to wood-polish or cloth, 
and its circular action preventing its running off the 
table. 
Diagram 1 shows the table as in use. 
1. 
