deletions | additions       diff --git a/figures/2.9/caption.tex b/figures/2.9/caption.tex  index d89776d..8a8571f 100644  --- a/figures/2.9/caption.tex  +++ b/figures/2.9/caption.tex 
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Section 2.3 covered how to string 4 2-bit adders in order to create a 4-bit adder. I connected the first 4 DIP switches together to 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 that took the second bits of the a and b bundles and added the three bits together and displayed the result in the second 7-segment display. After tying the 4 adders together, I was able to take the final cout and transmit it to another display which displayed the constant 1 and  was otherwise blank.