PREFACE TO THE REVISED EDITION. 



Since publishing the original article which appeared in the Annual 

 Report of the Commissioners of Inland Fisheries for the year 1906. 

 the lobster rearing at the Wickford Experiment Station has continued 

 under the writer's personal superintendence. The changes in appara- 

 tus and methods, which have been almost without exception the re- 

 sults of his own devising, have been so considerable that it has been 

 thought best to bring them together. As it is necessary, in order to 

 make the subject more easily understood, to give a rather detailed 

 account of the process of rearing lobsters at Wickford, it has been 

 decided to follow the plan of the original paper, incorporating into it 

 the changes and successes which have attended the work since 1906. 



The principal changes in apparatus and methods to be noted since 

 the previous article are: — 



The substitution of durable wooden boxes to replace the unreliable 

 canvas bags, and the necessary devices attendant upon this change. 



The adoption of a unit system of raft structure, which makes a 

 great extension of the apparatus possible. 



Changes in the gearing and shaft arrangement which greatly re- 

 duce the loss of power in the long lateral extensions. 



Devices for easily and quickly handling the rearing boxes. 



A method of handling the hen lobsters while they are hatching their 

 eggs, which very closely follows natural conditions and gives uniform 

 and excellent results in the rearing cars. 



Extending the rearing beyond the fourth stage. 



A more effectual method of liberation. 



