PREFACE. 



The substance of this little book -was 

 delivered by myself, in the form of a 

 Lecture, at the Royal Institution, Albe- 

 marle Street, on the 17th of April, 1863, 

 and is a record of the observations which 

 I have made during my experiments in 

 Fish Hatching carried on during the winter 

 months. From time to time I have reported 

 progress in the columns of " The Field," 

 and have now, by the permission of the 

 Editor, been enabled to embody my notes 

 in these pages. 



I have, however, added much information 

 (though I continue to speak in the first person) 



