VALUE OP OBSERVATION. 3 



observation, followed bj close reasoning, has 

 led to the realisation of important practical 

 facts, which promise to be eventually the 

 origin or increase of revenue to private in- 

 dividuals — a source of national wealth, and 

 certainly a great boon to the public in 

 general. 



The culture of fish is just now beginning 

 to attract public notice in this highly-favoured 

 and densely-populated island, and it will be 

 my aim to show you both its theory and 

 practice, whereby those who have no oppor- 

 tunity of carrying it out, may reason upon 

 its scientific phenomena : those who have 

 fisheries, ponds, and other waters, may 

 actually develop the theory into practice. 

 But in order that you may rightly under- 

 stand why fish should be cultivated by 



B 2 



