774 
IffM STEPS. 
Figure 1. Characteristic curve of Kodak 2424 I.R. film with 
associated image. Note the overexposure in the highlighs. 
(Film average gradient = 1. 10) 
Figure 2. Agfa (left) and Kodak (right), scale 1:40000, Average 
Gradients: Agfa=l. 77, Kodak=l. 91 
Figure 3. Agfa 150 (left) and Kodak Plus-X (right), original 
scale 1:40000 enlarged 18X. Average Gradients: Agfa=l.77, 
Kodak=l. 91.