NO. 13 



THE MELIKERON ALDRICH 



Referring to figures i and 2, we may see how the honeycomb is 

 mounted. Figure i is a view looking vertically down upon the instru- 

 ment with shutter (e) wide open. Figure 2 is a vertical cross-section. 

 Two nickeled copper plates {i, h) , each with square holes 3 cm. on 

 a side are placed one about 6 mm. above the other. The plates are held 



Fig. 3. 



together by the three posts {h) and the space between the plates 

 around the square hole enclosed with a copper box {m) attached to 

 the upper plate. The wires leading to the four binding posts {a, a, 

 a', a') pass through holes in this copper box. Four nickeled copper 

 clips (c) are screwed to the top of the upper plate, and four more 

 to the bottom of the lower plate. Each of these eight clips holds in 



