INSECT INTOXICATION. 509 



Human reason and animal instinct seem alike assailable 

 by these seductive influences, for I am pretty certain, 

 judging by numbers, that the same individuals return 

 again and again to their drunken orgies. 



ON THE EELATIVE VALUE OF OLAKIFIED AND 

 UNOLAEIFIED SEWAGE AS MANTJKE. 



[Abridgment of paper read at Brighton before the British Association 

 for the Advancement of Science, 1872.] 



1TAKE it as a good sign of the times that the 

 sewage question is engaging the attention of some 

 of the first and most earnest minds in the country. Every 

 individual in England is interested in it from a sanitary 

 point of view, and to householders of limited means it is 

 a question of vital importance from a monetary point of 

 view. Our sewage must be effectually got rid of at what- 

 ever cost. We live by breathing as well as by eating and 

 drinking, and our sewage cannot any longer be allowed to 

 pollute the air we breathe and the water we drink, thereby 

 increasing the death-rate among the weakly and enervating 

 the strong. If we can dispose of it at small cost, rate- 

 payers will be charged low rates ; if only at great cost, 

 high rates ; and the difference between high rates and low 

 rates is equivalent to the difference between easfe and 

 anxiety, comfort and hardships, in thousands of English 

 homes. But I am not here to-day to enter into all the 

 bearings of this wide and difficult question, but merely to 

 state my views of the value of "clarified" and "unclarified" 

 sewage as manures, and I contend that the vegetable 

 physiologist and practical horticulturist should be able 

 to throw some light on this branch of the subject. I may, 

 perhaps, be permitted to state that I have looked long and 

 earnestly at this question, both from the theoretical and 



