NEW YORK 



BOTANICAL 

 PREFACE. OAP.DEN 



There is little to add to what was stated in tlie Preface to 

 Vol. III., the plan there explained having been followed in the 

 present volume. 



The section of the ' Summary of Current Kesearches/ which 

 deals with Microscopy (properly so called), is now, it is believed, as 

 complete as it can be usefully made. The Editors have every 

 wish that the sections of Zoology and Botany should be equally 

 complete, but the possibility of giving practical effect to this desire 

 is unfortunately limited by considerations with which it is out of 

 their power to deal. 



It should be observed that the ' Summary ' as well as the 

 ' Transactions ' includes original communications from Fellows 

 and others. 



So many requests have been made that the Microscopical 



Bibhography should be continued, that it is intended to give in 



future volumes a list of all the Books and Papers from time to 



time published relating to Microscopy, divided in the same way as 



the corresponding part of the ' Summary,' viz. into (a) Instruments 



and Accessories, and (/3) Collecting, Mounting, and Examining 



Objects. Where it is not intended to publish an abstract of a 



> paper included in the Bibhography, a brief note of the purport of 



t the paper will be added when this is not sufficiently indicated by 



the title alone. The new list will commence at the point where 



J the old one left off, so as to cover the intervening period. 



; The Index has been continued on the same extended basis as 



^ hitherto, and a List of Authors has been added. The classified 



portion of the Contents now includes cross references to any notes 



a 2 



