This Book is Dedicated to 



KAJ LINDERSTR0M-LANG and HEINZ HOLTER 



of the Carlsberg Laboratory, Copenhagen, in appreciation of 

 their scientific achievements, which have contributed gener- 

 ously to the development of histo- and cytochemistry, and in 

 appreciation of their fine human qualities of integrity, under- 

 standing, and a truly civilized sense of values and of humor. 



