98 MICROSCOPICAL RESEARCH IN THE 



principle holds good in many cases with reference to form, habits, 

 sound of voices, smell, taste, and in insects probably other senses 

 quite unknown to us. We thus get a glimpse of the Infinite, and 

 see how very little we yet know of the commonest phenomena of 

 nature. 



flDetbobe of flDicroacopical IReeearcb in tbe 

 Zoological Station in IRapIee* 



By C. O. Whitman. 

 From " The American Naturalist^ 



FIRST PAPER. 



IN the preparation of this paper. Dr. Mayer has allowed me to 

 make free use of his excellent article,* published about two 

 years ago. I have added the methods of Dr. Giesbrecht, Dr. 

 Andres, and some others who have worked in the zoological 

 station. Dr. Mayer has further placed at my disposal such 

 improvements and alterations as he has been able to make since 

 the publication of his paper. I am also deeply indebted to Dr. 

 Mayer for advice and generous assistance, for which I wish here 

 to give expression to my most sincere thanks and grateful appre- 

 ciation. 



I am still further indebted to Dr. Eisig, Dr. Lang, Dr. Andres, 

 Dr. Giesbrecht, Professor Weismann, and Professor Dohrn, all of 

 whom I have had occasion to consult with reference to matter 

 contained in this paper. 



I. — Preservative Fluids. 



Killing, Hardening, and Preserving, are three kinds of work, 

 requiring for their accomplishment sometimes only a single pre- 

 servative fluid, but in most cases two, three, or even more. As 



* Mayer. *' Mittheilungen aus der Zoologischen Station zu Neapel." Vol. 

 II., p. I, 1880. 



