Lawrence Engineering Grizzle Gas Pipe Line Slide Rule

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Country of manufacture: USA,            Date of manufacture: ____
Overall length: 36.0 cm,          Width: 2.9 cm,           Weight: 38.7 gms
Materials: wooden body and slide, scales printed on painted surfaces
Cursor: Two cursors, each 2.0 X 3.2 X 0.6 cms; all plastic; lines = single line, front side only
Scales: 19, Note: scale designations are specialized, not those used on generic slide rules
Front: B (Inlet Gauge Pressure), A (inlet gauge pressure) [ A1 (outlet gauge pressure), C (Pressure Ext.), Q (Cu. Ft.per Day), L (Length in Miles) ] Pressure Base, Specific Gravity, E (Efficiency), D (Inside Diameter of Main Line), F (Pressure Extension), H (% of Line Looped)
Slide Back:[ B1 (Outlet Gauge Pressure), C1 (Pressure Extension), K (Equivalent Length per Mile of Loop), R (DL/D), M, G (Increase in Capacity). DL (Diameter of Loop Line)
Back: Instructions for Use
Condition: C2-C3 (Mint to very minimal signs of use
Came with: Original brown leather sheath

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