TECHNICOLOR AND OTHER METHODS 205 



In color those added features would have required 

 at least twice the projection time to have grasped 

 what was taking place, so the lapse-time interval be- 

 tween each picture could have been five minutes in- 

 stead of ten. To have pictured its blood circulation 

 and breathing the interval could have been one 

 second, and taken during the latter part of its in- 

 cubation and without changing the focus, for a pe- 

 riod sufficient to give some twenty-five seconds on 

 the screen, the entire picture from egg to fish then 

 being shown in about a minute and a quarter. But 

 in that seventy-five seconds what a story! The be- 

 ginning of active life in all its ramifications; some- 

 thing only a few eyes have witnessed, and those never 

 in such a connected story, so condensed and enlarged 

 on the screen that its full significance can be grasped. 



The necessity of color is evident to show what is 

 actually going on whether it is in an egg or a pollen 

 grain, and the problem is how to simplify the tech- 

 nique and make use of various forms of light to 

 bring out the required results. 



Microscopists know that to see a subject at its best 

 various forms of lighting must be tried; direct light, 

 dark field, polarized, ultra violet, and many, many 

 other forms. And as light is waves of energy reflected 

 from the subject, the length or shortness of those 

 waves of energy must also be taken into account. 



