Warington^ on Additions to his Microscope. 61 
thus employed. This, however, was more complicated than 
accorded with my own ideas of portability, and I have, 
within the last six months, had the box which contains the 
microscope arranged on my own plan in the manner ex- 
hibited. Here it will be seen that the plate of wood which 
forms the principal support of the instrument when in ordi- 
nary use fulfils the part of the lid to the box, having two 
small pins for insertion into the margin at one extremity, in 
lieu of hinges, and a small lock at the other. The box is 
Fig. 1. 
ri-. 2. 
eight inches long by three and a half wide, and three and a 
half inches deep externally, and having at one end of the in- 
terior, at each side, a groove cut, half an inch wide, to admit 
the extremity of the part which represents the lid, and thus 
form a long projecting foot, as at c (fig. 2), for steadying the 
table when in use ; a small bar is attached, with a pin, below 
the end of this, to bring it on a level with the exterior of the 
box. Another groove on each side of the interior, of the 
same width,^and two and a half inches from the upper ex- 
tremity, is also constructed, and into this the strut or right- 
angled piece of the stand of the microscope is introduced, 
thus forming the shelf, as at b (fig. 2), to which the clamp 
is to be attached ; the upper end of the box forming the 
platform or small table for the miniature tank. 
In this way a very efficient apparatus is constructed, and 
I trust, on some future occasion, to have the pleasure of 
bringing some of the results of observations made by means 
of these simple arrangements under the notice of the 
Society. 
I may be allowed to state that Mr. Salmon is making 
these small instruments with the box complete, without 
object-glasses, for £3. 
