KODAK DKl'ELOriXG MALI UK J. 



The Kodak Developer Powders con- 

 tribute their part in making the Develop- 

 ing Machine a success. They are especial- 

 ly prepared for use with the machine, and 

 have as a base pyrogallic acid, a devel- 

 oper that is unequalled for the latitude 

 which it allows in development or for the 

 brilliancy of the negatives which it pro- 

 duces, but which has hitherto proven un- 

 popular for 

 amateur use 

 because of 

 the fact that 

 it stains the 

 fingers a dis- 

 agreeable yel- 

 low. Used in 

 the Develop- 

 ing Machine, 

 it, of course, 

 does not 

 come in con- 

 tact with the 

 fingers, and 

 all objection 

 to it is over- 

 come. 



The first 

 question re- 

 garding ma- 

 chine devel- 

 o p m e n t 

 which will 

 come to the 

 mind of the 

 skeptical 

 photographer 

 will assuredly 

 be : " When 

 there are both 

 s nap-sh ot s 

 and time ex- 

 posures on 

 the same strip 

 of film, or 

 when there 

 are several 

 unequal ex- 

 posures, how are all to be correctly devel- 

 oped, there being no opportunity for in- 

 dividual treatment?" 



We, ourselves, before experimenting, 

 felt that the machine might fail under 

 these conditions, but the practical results 

 show that within any reasonable limits it 



The Developer is Poured Off. 



does not. The remarkable "latitude'' 

 which Kodak film allows in exposure, 

 combined with the constant agitation of 

 the negative during development, with 

 the peculiarly active properties of the 

 Kodak developer powders and the entire 

 absence of fog (ordinarily caused by the 

 dark-room lamp) upset all theories. The 

 pictures herewith give a practical demon- 

 stration on 

 this point. All 

 were made on 

 one strip of 

 film; all were 

 developed in 

 the machine 

 at one time 

 and none of 

 them was 

 "doctored." 

 They are 

 simply the 

 result of 

 straight 

 development 

 without after 

 treatment of 

 the negative, 

 the prints be- 

 ing made by 

 contact on 

 Velox paper, 

 with no 

 "m a s king" 

 or " dodging. '' 

 Nos. i and 2 

 are timed ex- 

 posures. No. 

 1 was given a 

 sixty second 

 exposure; No. 

 2, with the 

 same light 

 and with the 

 same opening 

 in lens, was 

 given six 

 minutes' ex- 

 posure, or six times as much. In actual 

 practice anyone with a week's experience 

 in picture taking could judge much more 

 closely than this as to the correct expos- 

 ure to give. A correct exposure in this 

 instance would have been two to three 

 minutes. The operator purposely made 



