DescriptionGraphical Firing Table (slide rule), made by Keuffel & Esser Company, (Hoboken, N.J.), April 1942. Laminated and screwed wood stock or stator 18-1/2" wide x 2-3/4" high x 17/32" thick, with mounted paper; cream paper printed in black and red; clear lamination film. With four slides as described below. Lacking: cursor or indicator (no wear apparent in groove where it would mount; may not have had one if this was a sample.) Per U.S. Army Ordnance Manual of 1944: "A graphical firing table is a device by means of which corrected fire data for a particular weapon [field artillery] and charge of ammuniton can be determined without lengthy calcuations." This object was a non-catalog item produced by Keuffel & Esser whose main office and factories were in Hoboken, N.J. when it was made. The rule here does not have any marking on it indicating that it was made by K&E, but several aspects of the item strongly identify it as likely to have been made by K&E and some elements suggest that it was a factory model or sample produced for review or approval. The size, layout, typeface and other markings are consistent with the tables they did make. While a great many of these types of items were produced in World War II and later, there is not a significant number described in available collector's or institutional records. See notes for more information. The light wear, lack of dents, etc, including the lack of an indicator are significant in believing that his item received little use. Slides rules, each can be inverted for use top and bottom (except slide 4, side 2) plus front and back. ---------- Slide 1, side 1: mathematical; Cos 1, Cos 2, Cos 3 Slide 1, side 2: mathematical; Sin 1, Sin 2, Sin 3 ----------- Slide 2, side 1: marked at right end: FT 105-H-3; marked at left end: HFB 4/28/42. Scale on upper part of slide: How., 105 MM; M2 & M2 A 1; Shell, H.E., M 1; Fuze, M48 & M54; Charge 1 inverts for: same as above but Charge 3 2, side 2: 2, side 1: marked at right end: FT 105-H-3; marked at left end: 80872. Scale on upper part of slide: same as slide 2, side 1, top except Charge 7. inverts for: same as above but Charge 5 ----------- Slide 3, side 1: marked at left end: FT 105-H-3; marked at left end: 80873. Scale on upper part of slide: How., 105 MM; M2 & M2 A 1; Shell, H.E., M 1; Fuze, M48 & M54; Charge 6 inverts for: same as above but Charge 7 Slide 3, side 2: marked at right end: FT 105-H-3; marked at left end: HFB 4/28/42. Scale on upper part of slide: How., 105 MM; M2 & M2 A 1; Shell, H.E., M 1; Fuze, M48 & M54; Charge 2 inverts for: same as above but Charge 2 ------------ Slide 4, side 1: marked at left end: FT 105-H-3; marked at right end: 80874. Scale on slide: How., 105 MM; M2 & M2 A 1; Shell, H.E., M 1; Fuze, M48 & M54; High Angle (for charges 1 to 7.) Slide 4, side 2: no end markings. Scale on slide: Gun, 37 MM.; M1916; Shell, MK.II; Fuze, B.D.; Subcaliber.