"Mais comment apprendre a bien conduire ses sens? 

 En faisant ce que nous avons fait lorsque nous les avons 

 bien conduits." Condiiiac. 



"Neither the naked hand nor the understanding left to 

 itself can effect much. It is by instruments and helps 

 that the work is done, which are as much wanted for 

 the understanding as for the hand." Bacon. 



"Ich sag' es dir: Bin Kerl, der spekuliert, 

 1st wie ein Tier auf dtirrer Heide, 

 Von einem bo'sen Geist im Kreis herumgefuhrt, 

 Und rings umher liegt schone grime Weide." 



Goethe. 



"La science s'avance parce qu'elle n'est sure de rien." 



Duclaux. 



"Natural philosophy is essentially united in all its 

 departments, through all of which one spirit reigns and 

 one method of inquiry applies." sir John Hetschei. 



"The logic of Science is the universal Logic, applicable 

 to all inquiries in which man can engage." j. s. Mill. 



