Helmholtz, Hermann Von. <br/><br/>
Popular Lectures on Scientific Subjects /  Textual Documents 
Hermann Von Helmholtz. 
 - 1st ed / 
 - New York :  Longmans, green, and co. ,  1900. 
 - 291p. :  ill ;  19cm . 
<br/><br/><label>ISBN: </label> HB 
<br/><br/><label>Subjects--Index Terms: </label>Scientific subject 
<br/><br/><label>Dewey Class. No.: </label>504  / He 368 Po