CONTENTS 



CHAP. PAGB 



I. CHILDHOOD AND EARLY LIFE . . I 

 II. STUDENT LIFE AND EARLY MANHOOD . 8 



III. SCIENCE IN GERMANY IN THE EIGHTEENTH 



AND EARLY PART OF THE NINETEENTH 

 CENTURIES 18 



IV. HELMHOLTZ IN BERLIN FERMENTATION 



ANIMAL HEAT . . . .25 



V. HELMHOLTZ IN BERLIN THE CONSERVA- 

 TION OF ENERGY .... 39 



VI. HELMHOLTZ IN KONIGSBERG MEASURE- 

 MENT OF THE RAPIDITY OF THE 

 NERVOUS IMPULSE .... 58 



VII. HELMHOLTZ IN KONIGSBERG THE OPH- 

 THALMOSCOPE . . . . .71 



VIII. HELMHOLTZ IN KONIGSBERG THE ME- 

 CHANISM OF ACCOMMODATION FIRST 

 VISIT TO ENGLAND . . . .88 

 xv 



