deletions | additions       diff --git a/figures/2.9/caption.tex b/figures/2.9/caption.tex  index a655dfa..d89776d 100644  --- a/figures/2.9/caption.tex  +++ b/figures/2.9/caption.tex 
...
Section 2.3 covered how to string 4 2-bit adders in order to create a 4-bit adder. After connecting I connected  the output of each subsequent addition first 4 DIP switches together  to the associated display, form a stream I called a.  I then  connected the second 4 switches into a bundle labeled b. I then added the first bit of each and transmitted the result to the first 7-segment display. The  cout of this operation was connected to  an adder to that took  the next one which handled second bits of  the case where a and b bundles and added  the sum of 2 three  bits together and displayed the result in the second 7-segment display. After tying the 4 adders together, I  was greater than 1. If able to take  the final addition had a cout, cout and transmit  itwas transmitted  to a 7-segnment another  display which was otherwise blank.