.Ralph McClarren, “Research Work of the Franklin Institute during World War II on Airborne Fire Control Apparatus” and others, in Journal of the Franklin Institute, October 1948, vol 246, No. 4, pp 273-292, with 19 in-text photos of the instrumentation. Features the Mark 8 torpedo director, gyro for lead computing gun sights, hand-held low-level bomb sight, upper turret fire control, VASS bomb sight, Mark 20 hand-held low-level bomb sight, slant range computer, hand-held bomb sight device for blimps, GRASP II, and many others. Offered in the full volume of 546pp. Bound in green library cloth; bookplate and a few stamps on the title page, otherwise a fine copy. $95

Also bound with Andrew Sobczk, “Carrier-Frequency Servomechanisms I-III, pp 21-44, 95-122, 187-214

Reinhold Rudenberg, “Electorn Lenses of Hyperbolic Field Structure”, pp 311-339, 377-408.

Enos Witmer and Martin Pomerantz, “The Effective Path Length Through a Vertical Cosmic-Ray Telescope”, pp 293-309.

W.V. Lyon, “Method of Solving Differential Equations with Constant Coefficients”.

W.F.G. Swann, “Certain Matters Concerning Scaling the Magnetron…”

And a lovely article by

Leonard Loeb, “The Mechanism of Lightning Discharge”, pp 123-147, with 19 photo images in text.

Numerous other articles.