378 THE POPULAR SCIENCE MONTHLY, 



Minister of Public Instruction, to appoint a commission to whicli I 

 may submit the dogs I have rendered insusceptible to rabies. 



The crucial experiment which I should try at the first opportunity 

 would be to take from my kennels twenty dogs insusceptible to rabies, 

 which should be put in comparison with twenty other dogs. The 

 forty dogs should be caused to be bitten successively by rabid dogs. 

 If the statements which I have made are correct, the twenty dogs 

 deemed by me insusceptible will all escape, while the other twenty 

 will be attacked by rabies. In a second experiment, not less decisive, 

 forty dogs would be used, of which twenty had been previously vacci- 

 nated, and the others had not. The forty dogs should be trepanned 

 with the virus of a mad dog. The twenty vaccinated dogs would 

 escape, and the other twenty would all die of rabies, with paralysis, 

 or with mania. — Translated for the Popular Science Monthly from 

 the Hevue Scientifiqite, 



THE MOEALITY OF HAPPI]Si:SS. 



By THOMAS FOSTEE. 

 CAEE FOR SELF AS A DUTY. — (CONTIJS^UED.) 



IT will perhaps be sufficient, in response to numerous inquiries ad- 

 dressed to me respecting the supposed religious bearing of these 

 papers, to remark that they are not intended to have any religious 

 bearing whatsoever. I am simply inquiring what are the rules of con- 

 duct suggested when each person takes as his guiding principle the in- 

 crease of the happiness of those around, an expression which must be 

 taken as including himself in the same somewhat Hibernian sense in 

 which Milton included Adam among " those since born, his sons." I 

 may add that nearly all the letters addressed to me have been in- 

 teresting, and some have been singularly well-reasoned — all utterly 

 unlike the rather spiteful and very silly letters I referred to in a foot- 

 note to my last paper. Yet I can not suffer the religious element to be 

 imported into the subject — no matter how courteously or kindly the 

 thing may be done. I have just the same objection to see the question of 

 the evolution of conduct considered from that side, which the student 

 of astronomy or geology has against dealing with the objections and 

 difficulties raised by those who seem always to suspect that under the 

 teachings of God's work, the universe, there may lie some grievous de- 

 ceptions if not some monstrous falsehoods. If my reasoning is bad, it 

 can be met and overcome on its own ground. 



I may, however, make this general remark with regard to all sys- 

 tems of morality whatsoever, including those which have come before 

 men in company with religious teachings. Without a single exception 



