176 SCIENCE PROGRESS. 



who, like Ludwig, was also deeply imbued with the artistic 

 sense. 



It is, perhaps, not too much to say that Ludwig's labours 

 have largely revolutionised physiology, while our whole 

 manner of looking at physiological problems is largely due 

 to the influence he has exerted on the progress of the 

 science. He was essentially, and above all, a born ex- 

 perimenter. He was thoroughly at home both in the 

 laboratory and lecture room. His views he always sub- 

 mitted to experimental investigation, and in doing so he 

 exhibited a faculty for the invention of mechanical ap- 

 pliances which was surprising. One, perhaps, of the best 

 known and most ingenious of these is his method — along 

 with Dogiel — of estimating the velocity of blood-flow by 

 means of his " Stromuhr," an instrument well known to 

 students of physiology. Ludwig was, in the truest and 

 widest sense of the word, not only a physiologist but also 

 a philosopher. It was not enough for him to "speculate' 

 or "theorise" upon a subject, the theory had to be sub- 

 mitted to experimental proof. 



Moreover many departments of physiology which had 

 long remained within the sphere of vitalistic influence 

 were by him submitted to investigation by the most 

 exact physical methods. In fact Ludwig did for physiology 

 as a whole, what Spallanzani did for a great chapter of 

 chemical physiology. Abbe and professor were imbued 

 with the same spirit. 



The preceding pages are to be regarded as a slight 

 tribute of admiration and gratitude, and as a thankoffering 

 to C. Ludwig, that "homo ammirabile " as Fano calls him, 

 from one who received much kindness and instruction at his 

 hands, and who had the honour and privilege of much inter- 

 course with him for many years. Whatever monument 

 may be raised to his memory by his pupils, his works and 

 the imperishable impress which his genius and his labour 

 have imprinted on physiology will ever remain his true 

 monument, to attest the greatness of his intellect to succeed- 

 ing generations. 



William Stirling. 



