Vlll. TRANSLATOR S PREFACE. 



In spite of the fact that most of the leisure hours of a somewhat busy 

 life have, during the last three years, been devoted to this work and that 

 every care has been exercised in testing the many references, it is 

 feared that errors, both of translation and reference, will be found, to 

 which it is hoped readers will extend their generous indulgence. 



The Author has referred to the Translator's work in terms of unjustifi- 

 able eulogy. The latter, however, feels that no English amateur, 

 with any enthusiasm, will be able to refrain from admitting that 

 this admirable work, with its elaborate tables and carefully conceived 

 diagnoses, modified to meet the requirements of the student of our 

 country, places us all under great obligations to the great Belgian 

 Diatomist. 



W. E. B. 



170, Church Street, Stoke Newington, London, N. 

 1st October, 1896. 



