Slide rules HOME page COLLECTION 5" RULES
Make Pickett, USA
Model N600 - T Log-log speed rule

1. This rule has 22 scales and, as with many Pickett rules, packs a lot of functionality into a small space.
2. One feature on this rule is the presence of a Ln scale for logarithms to the base of e.
3. An example of how space is conserved is the way the log-log scales are placed in parallel with values for numbers greater than one (marked in black) and less than one (marked in red) are placed side by side.

Front view
0520-pickett-n600-01.jpg (12439 bytes)
Detail - front left
0520-pickett-n600-02.jpg (12572 bytes)
Detail -front right
0520-pickett-n600-03.jpg (14253 bytes)
Back view
0520-pickett-n600-04.jpg (12366 bytes)
Detail -back left
0520-pickett-n600-05.jpg (14451 bytes)
Detail - back right
0520-pickett-n600-06.jpg (14719 bytes)
Manufacturing date c 1970
Length 5"
Material Metal
Scales LL1, LL01, A [ B, ST, T, S, C ] D, DI, K
LL2, LL02, DF [CF, Ln, L, CI, C] D, LL3, LL03
Cursor Plastic
Hair lines Single line