Hermann Ebbinghaus 
Memory [PDF ebook] 
A Contribution to Experimental Psychology

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The principal objections which, as a matter of course, rise against the possibility of such a treatment are discussed in detail in the text and in part have been made objects of investi gation. I may therefore ask those who are not already convinced a priori. Of the impossibility of such an attempt to postpone their decision about its practicability.