In "'(1. . #\#)" the "1." is a number. You are correct that you don't need digits after the decimal point. And #\# is just the pound character. `(1 ,2) is a

In "'(1. . #\#)" the "1." is a number. You are correct that you don't need digits after the decimal point. And #\# is just the pound character. `(1 ,2) is a proper list, and `(1 ,@2) is an improper list. You'll want to check out unquote-splicing: http://www.cs.rpi.edu/academics/courses/fall00/ai/scheme/reference/schintro-v14/schintro_129.html#SEC182 http://www.cs.rpi.edu/academics/courses/fall00/ai/scheme/ref...