322 
MATERIAL USED AND METHOD 
OF CONSTRUCTION 
PACIFIC SCIENCE, Vol. XVII, July 1963 
The device built on the above principles con- 
sists of two independent parts: (A) a steady 
stand for supporting the cultures to be photo- 
graphed, and ( B ) a movable carriage on which 
a microscope and its camera and substage lamp 
are mounted so that the microscope and its 
accessories can travel from culture to culture 
without disturbing the stand or the organisms 
on it. The materials used for the construction of 
this device are limited to the few simple items 
listed below: 
7-ft length of 2 X 2-inch wood 
piece of 28 X 8 X 1-inch plywood 
12 -ft length of Vi -inch wide V^-inch thick 
angle aluminum 
20 X 8 X Vi-inch sheet of aluminum 
1 dozen No. 8, 1-inch wood screws 
8 self-tapping sheet metal screws, size 
3 /32-i/4-inch 
3 aluminum sheaves, 5i-inch in diameter 
11 machine screws with nuts, size 3/32- 
V4-inch 
6-ft length of 3-sided 1 -inch-square ex- 
truded aluminum channel 
piece of 5 Vi X 28 X Vi -inch plate glass 
All these are easily obtainable from local hard- 
ware stores. 
A. The stand. This independent part of the 
instrument is made of a rectangular wooden 
base, two aluminum trapezoidal end supports, 
and a rectangular glass toppiece or stage. The 
construction of these three parts is summar- 
ized below. ( 1 ) From the 2 X 2 -inch lumber, 
two 11- and two 31-inch lengths are cut. These 
four pieces are joined at right angles by means 
of either end-lap joint or pinned tenon-and- 
tusk joint into a rectangular base measuring 
31 X 11 inches on the outside. (2) From the 
Vs- -inch-thick sheet of aluminum two 8X8- 
inch pieces are cut and each is shaped into a 
near trapezoid (it will be referred to as trape- 
zoid in this paper for simplicity), as shown 
in Figure l A, by cutting off a triangular piece 
whose two sides adjacent to the right angle are 
2 and 6 inches long (area ABC in Fig. 1 A). 
After rounding the corners, two 5/32-inch holes 
Fig. 1. Parts of the stand. A, Aluminum end sup- 
port used as left end of stand. 1, 2, 5/32-inch holes; 
1 being 1 inch from vertical edge and 2 5 inches 
from 1; 3, 4, 3, are three beveled holes 3 inches apart, 
3 being 1 inch from vertical edge, and all Yl inch 
from the bottom. B, Diagram of angle aluminum end 
frame for plate-glass toppiece or stage. Two upper 
holes 5/32 inches, two lower ones Ys inch. C, End 
portion of plate-glass toppiece or stage showing plate 
glass l , mounted between two 28Yl -inch strips of 
angle aluminum, 2, which are attached on end piece, 
3. The two VXinch holes, H, are for mounting the 
toppiece or stage on the trapezoid end support. D, 
Sectional view of right end of stand, showing method 
of mounting trapezoidal end supports. 2, on wooden , 
base, 3; and toppiece or stage, 1, on the trapezoid, ; 
2. S, No. 8 wood screw; H. sheet metal self-tapping i 
screw. 
