140 Wisconsin Academy of Sciences, Arts and Letters. 
other. So, also, “I have the book you wanted” has all the 
cohesion that belongs to “I have the book” or to “you wanted 
the book.” In general then it may be claimed that centro- 
lateral thought, when thus constructed, has the same integrity 
as either central or lateral constituent. 
THE CENTROLATERAE FACTOR. 
In the illustration “I have the book you w r anted,” the idea 
expressed by “book” is plainly, without a repetition (pp. 116- 
117), member of a central thought expressed by “I have the 
book,” and member of a lateral thought expressed by “you 
wanted the book.” Accordingly, of total centro-lateral thought, 
the idea expressed by “book” may be known as the centro- 
lateral factor—centro-lateral, this time, in the sense of being 
central as well as lateral, but not (as in the preceding title) 
in the sense of including central and lateral elements. 
In such an integration of central and lateral thought, the 
former may be said to share a factor with the latter; it is 
however a little more convenient to put it that, as there is no 
room in central thought for lateral thought or any of its fac¬ 
tors, room is made by the suppression of a central factor, the 
space made vacant being occupied by a factor 25 of lateral 
thought. 
Once a factor of lateral thought becomes a factor also of cen¬ 
tral thought, it plainly becomes a central' factor. That is, in 
centro-lateral thought, the once-thought common factor of its 
two constituents—i. e., the centro-lateral factor—is central ra 
the central constituent, while in the lateral constituent remain¬ 
ing lateral. 
This double aspect of the centro-lateral factor appears in 
the following illustration: “The Episcopal church contains 
25 The possible simultaneous use of two ideas as members of two 
thoughts has been examined in the “Revision of Pronouns,” appearing, 
to he extra-linguistic. Compare “I have the book who (=1) wanted” 
and “I have the book you whiched (=had).” The simultaneous use 
of three factors abrogates the existence of one thought, as appears in 
experimenting on “I have the hook” and “You wanted the paper.” So 
soon as three factors are simultaneous, there remains only “I have the 
hook” or “You wanted the paper” or “I wanted you,” etc. 
