Photomicrographic Records — Hsiao, FUJII, and Fine 
323 
5 inches apart are drilled Vi inch from the top 
and Vi inch from the vertical edge of one of the 
trapezoids. Three 3/ 16-inch holes spaced 3 
inches apart are next drilled Vz inch from the 
bottom and 1 inch from the vertical edge. The 
holes on the second trapezoidal end support are 
similarly drilled but are done from the oppo- 
site surface so that this piece of aluminum 
forms a mirror image of the first one. ( 3 ) The 
rectangular glass toppiece or stage is made 
from a 5^2 X 28-inch strip of V 4 -inch plate 
glass and a rectangular frame made of VXinch 
wide angle aluminum. Two 554-inch sections 
are cut from the aluminum stock and four holes 
drilled in each piece. Along one side of the 
aluminum angle two 5/32-inch holes are drilled 
each Vs inch from the end, along the other side, 
two Vs-inch holes, each Vz inch from the end, 
are also drilled, as shown in Figure 16. Two 
28 ] / 2 -inch lengths of aluminum are cut from the 
same stock and two Vs-inch holes are drilled on 
each piece, each hole being Ys inch from the end. 
The 28-inch long plate glass is placed lengthwise 
between the inner .surfaces of the long alumi- 
num angle strips whose ends are then placed 
across the two short (554 inches ) end pieces 
in such a way that the outer surfaces of the 
four angle strips are in contact and the pre- 
drilled pg-inch holes on the long strips match 
the 5/32-inch holes on the short ones, as shown 
in Figure 1C, leaving the Vs-inch holes of the 
short strips exposed at the ends of the frame. 
Four 3/32- 1 / 4-inch self-tapping sheet metal 
screws are driven through the 5 / 32 -inch holes 
in the short end aluminum section tapping into 
the Vs-inch holes in the long sections to hold 
the aluminum frame and glass together. It will 
be noticed that all the 5/3 2 -inch holes are for 
the passage of, and the Vs-inch holes for the 
tapping by, the self-tapping sheet metal screws. 
To assemble the stand the two trapezoidal 
end supports are used to join the glass toppiece 
or stage to the wooden rectangular base. After 
placing the wooden base on a flat bench or 
table top, with its long sides running from left 
to right in front of the operator, the right 
trapezoidal end support is clamped with a C- 
clamp on the inside of the 11 -inch-long end 
piece of the wooden base so that the vertical 
edge of the trapezoid faces the front of the 
stand, farthest from the operator and Va inch 
from the right distal corner of the rectangular 
base, the slanting edge nearest the operator, the 
bottom of the trapezoid flush with the bench 
top and the smaller openings of the three bev- 
eled holes against the inside surface of the 
wooden end piece. After drilling three holes 
into the wood, using the holes in the alumi- 
num trapezoid as guides, three No. 8 , 1 -inch, 
wood screws are driven into the wood until 
their heads are flush with the aluminum (see 
Fig. ID at S ). 
The C-clamp is released. Similarly the left 
trapezoidal end support is screwed on the in- 
side of the left end piece of the wooden base. 
The aluminum framed glass toppiece or stage 
is fastened to the trapezoidal end supports by 
apposing the two Vs-inch holes on each end 
angle aluminum piece (6 in Fig. 1C) to the 
two 5/32-inch holes near the top of each trape- 
zoid and a round-head self-tapping sheet metal 
screw driven from the outside through the 
trapezoidal end support, tapping into the angle 
aluminum as shown at H in Figure ID. When 
properly assembled this stand is very steady 
and can support a large number of culture 
slides or vessels on the plate glass. 
B. The carriage. This part of the instrument 
consists of a platform with track, a cart for 
carrying the microscope and its accessories, 
and a number of spacers of uniform size. ( 1 ) 
The platform is made from a piece of 1 X 28 
X 8 -inch plywood and two strips of angle 
aluminum. Each piece of aluminum is cut 28 
inches long and two 5 /32-inch holes drilled 
through the apex of the angle, Vz inch from 
each end, and beveled. One piece of the drilled 
aluminum is placed along the edge of the ply- 
wood board with the apex pointing upward 
and a No. 8 , 1-inch, wood screw driven through 
each hole into the wood. The second piece of 
angle aluminum is placed parallel to the first, 
but with its apex 5 Vs inches from that of the 
first, and fastened on the wood in a similar 
way. These two pieces of angle aluminum form 
the track on which the microscope-carrying 
cart moves. ( 2 ) The microscope-carrying cart 
is constructed from a piece of the V^-inch sheet 
aluminum, 5 X 6Va inches in size, with three 
pieces of angle aluminum and three Vs -inch 
aluminum sheaves attached to its under surface. 
Six 5/32-inch holes, as indicated by No. 1-6 in 
