736 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
of horse-shoe form. The sub-stage, which has centering-screws, is carried 
on a bar pivoted to the stage-plate ; the coarse-adjustment is effected by 
a spiral movement in the body of the sub-stage, and the fine-adjustment 
is by a micrometer-screw actuated by a milled head at the bottom of the 
bar ; the condenser supplied is an Abbe achromatic of either N. A. 1 • 40 
or N.A. 1 • 20. The sub-stage is attached to the side of the stage, and 
can be turned in or out of position as desired. The triple nose-piece 
on this stand is so adapted that the objectives focus in the same plane. 
The slotted tail-piece carrying the mirror can be swung round to allow 
of the mirror being used for super-stage illumination. 
Messrs. Ross & Co.’s “Eclipse” Binocular Microscope. — This stand 
(fig. 82) differs from the other examples of the “ Eclipse ” class in having 
a “ bent claw ” foot instead of a circular ring. The sub-stage apparatus 
is attached to the under side of the stage-plate, and can be turned in or 
out of position as desired. 
The adjustments and the me- 
thod of fixing the mirror are 
the same as in the preceding 
stand. 
Messrs. Ross & Co.’s 
“Eclipse” Petrological Mi- 
croscope. — A description of 
this Microscope (fig. 83) ap- 
pears on p. 509 of the August 
number of this Journal. 
Support for the Micro- 
scope.* — Mr. R. B. Coutant 
has devised a support in- 
tended for the use of large or 
small Microscopes in either an 
upright or inclined position. 
It consists of two triangular 
wooden boxes, one sliding in 
the other. When closed, the 
height of the boxes is 29J in., 
but the movable one can be 
drawn out and fixed in any 
position so as to increase the 
height up to 10 in. more. The 
inner box has a double top, 
between the layers of which a lamp-carrier swings horizontally 
through an arc of 90°. The upper and lower layers are each made 
up of three triangular pieces of wood (fig. 84) with the grain parallel 
with the outer edge so as to prevent warping. Three pieces of wood 
(the unshaded parts of fig. 85) serve to keep the layers apart. The 
lamp-carrier, as shown in fig. 85, has a slot in which a screw passing 
through the top of the support engages so as to fix it in any position. 
The projecting end of the carrier has a slot, in which the upright rod of 
the lamp fits, as seen in fig. 86. The outer box is 18^ in. high. In the 
* English Mechanic, lx. (1894) pp. 108-9. 
Fig. 83. 
