Thanks to the following students who had found useful web sites on Scientific Scale (Logrithmic scale).

Sayfonh Norvang:
http://en.wikipedia.org/wiki/Logarithmic_scale
This is the one linked on the class web. It has many useful info and links.

Paige Petersen:
http://en.wikipedia.org/wiki/Logarithms#History

Jennifer Avila:
http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Napier.html
This is a good site for history in math.

Alex Kowalczyk
 http://www.remanley.clara.net/cajori.pdf
 http://www.du.edu/~jcalvert/tech/slidrul.htm