Supplement to "Nature," December 23, 1922 



stock, in a complete set of cords, the dried virus of 

 rabies, in every shade of strength, from non-virulence 

 up to full virulence. [With a course of vaccines made 

 from these cords, begin- 

 ning at non-virulence, he 

 could immunise his patients 

 — each dose being made 

 safe by the dose of the 

 previous day. He could 

 do this while the disease 

 itself was latent in the scar 

 of the bite, locked-up and 

 inert. He could outwit the 

 natural disease : could take 

 advantage of its latent 

 period, and deprive it of 

 its one and only chance 

 of flaring-up. 



Long before 1885, Pas- 

 teur's teaching went all 

 over the world. Between 

 1880 and 1890 came the 

 discoveries of the germs of 

 tubercle, cholera, diph- 

 theria, tetanus, and Malta 

 fever. In 1893, diphtheria 

 antitoxin, and the pro- 

 tective treatment against 

 cholera. In 1894, tetanus 

 antitoxin. In 1896-97, 



Fig. 2. — Pasteur statu 



the protective treat- 

 ments against typhoid and plague. And so on. 

 There is no room here to try to guess how many 



millions of animal lives have been saved or safeguarded 

 by the protective treatments against anthrax, rinder- 

 pest or pleuro-pneumonia : no room to say what has 

 been gained by the mallein 

 test for glanders. Whether 

 we look at the animal 

 creation or at our own, 

 we find everywhere the 

 following-out of the new 

 learning which Pasteur 

 made possible. 



The War demonstrated, 

 on a vast scale, the supreme 

 importance of the methods 

 of preventive medicine. 

 They go back, all of them, 

 to that original plan of 

 isolating, cultivating, and 

 finally standardising and 

 grading, the agents of 

 disease : that plan which 

 Pasteur took in hand in 

 1877. 



Happy are those of us 

 who remember the joy of 

 seeing him, hearing him, 

 shaking hands with him. 

 Let alone the wonder of 

 his discoveries, there is 

 the wonder of the beauty 

 of his spiritual gifts. Our 

 admiration of what he did for us cannot hide 

 from us what he was in himself. 



: Sorbonne, Paris. 



Pasteur Aphorisms. 



Science has no nationality because knowledge is 

 the patrimony of humanity, the torch which gives 



light to the world. 



* * * 



If science has no country, the man of science should 

 have one, and ascribe to it the influence which his 

 works may have in this world. 



* * * 



The cultivation of science in its highest expression 

 is perhaps even more necessary to the moral condition 

 than to the material prosperity of a nation. 



Science should be the highest personification of 

 nationality because, of all the nations, that one will be 

 foremost which shall be first to progress by the labours 

 of thought and of intelligence. 



Nothing is more agreeable to a man who has made 

 science his career than to increase the number of dis- 

 coveries, but his cup of joy is full when the result of 

 his observations is put to immediate practical use. 



Blessed is he who carries within himself a God, an 

 ideal, and who obeys it ; ideal of art, ideal of science, 

 ideal of the gospel virtues, therein lie the springs of 

 great thoughts and great actions ; they all reflect the 



light of the Infinite. 



* * * 



. . . two contrary laws seem to be wrestling with 

 each other nowadays ; one, a law of blood and death, 

 ever imaging new means of destruction and forcing 

 nations to be constantly ready for the battlefield — the 

 other, a law of peace, work and health, ever evolving 

 new means of delivering man from the scourges which 



beset him. 



* * * 



. . . the characteristic of erroneous theories is the 

 impossibility of ever foreseeing new facts ; whenever 

 such a fact is discovered, those theories have to be 

 grafted with further hypotheses in order to account for 

 them. True theories, on the contrary, are the expres- 

 sion of actual facts and are characterised by being able 

 to predict new facts, a natural consequence of those 

 already known. In a word, the characteristic of a 

 true theory is its fruitfulness. 



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