PLATE 1. 



Figure 1. Exp. 69. Mag- 

 netite arc, double lens system, 

 no screen, exposure 20 min- 

 utes. This exposure was 

 about 200 times the liminal 

 exposure for photophthalmia. 



Cornea 12 days after ex- 

 posure. The epithelium ha^ 

 reformed. The stroma is 

 softened down to Descemets 

 membrane. The unevenness 

 of the corneal surface is due to 

 the irregular shrinkage of the 

 semiliquefied tissue in the 

 process of fixation. Note 

 that the effect on the stroma is progi'essively greater and more widespread towards the 

 external surface. Photo. X 12. 



Fig. 1. 



Figure 2. Exp. 81. Mag- 

 netite arc. Double lens sys- 

 tem, water cell, flint glass 

 screen (305 mm), exposure 1 

 hour. 



Relatively slight heat effect 

 on the cornea after three days. 

 The epithelium is intact but 

 the endothelium is destroyed. 

 The corneal corpuscles are 

 present and actively prolif- 

 erating in the anterior layers, 

 while many of them are de- 

 stroyed in the posterior layers. 

 Photo. X 32. 



Fig. 2 



Figure 3. Exp. 88. Mag- 

 netite arc. Double lens sys- 

 tem, no water cell. Flint glass 

 screen (315 mm), exposure 1 

 hour. 



Marked heat effect on cor- 

 nea after 48 hours. The 

 epithelium is intact. I'he 

 stroma is swollen to twice its 

 normal thickness and the cor- 

 puscles are completely de- 

 stroyed in the most exposed 

 area. At the periphery the 

 reappearance of the corpuscles 

 is abrupt and they are in 

 active proliferation. The en- 

 dothelium is destroyed over 

 a large area. Photo. X 39. 



Fie. 3. 



