London: Headley Brothers Ltd 1974. First Separate Edition. 7 pages plus 4 pages center fold with color illustrations of chemistry of SX-70 integral film and sample images. 8 1/4 x 11 inches. Tan printed wrappers. We also include the sample of press release information released by Polaroid at the time (lacks the mentioned issue of Scientific American with the first advertisement). Near Fine. Wraps. 
Edwin H. Land, the President of Polaroid, was the inventor of the in-camera self-processing photographic system. We know it as the social phenomena called the Polaroid SX-70, first released in 1973. Many of us were the subjects of the famous "click, chunk, whirrrr" followed by the magical appearance of a photograph which developed before our eyes. Gone was the necessity to send film to the lab for developing. Or as with the earlier multi-step process from Polaroid - take the image, time the film, tear it apart, and fix it all the while hoping we got it all right and captured baby Tammy's first step.
Land realized quite early that the instant gratification, instant development film camera would revolutionize picture taking for the masses. While the camera was expensive in the beginning, almost $200 plus $7 for each film pack, by 1974 (a year after release) some 700,000 had been sold. The first generation of true instant selfies became reality. You could take them one after the other with no waiting. A better chance to catch what you wanted. And then as the image developed, a family event happened. Astonishment as the picture developed in front of everyone's eyes.
In this offprint, The Royal Photographic Society reprints a speech by Edwin H. Land in May 1973 where he detailed not only some of the history, but many of the detailed technical workings of the camera for his fascinated audience. Scarce, and a piece of our cultural history, described in a technical light. "We now reproduce for the first time Dr. Land's description and illustration of the journal of the potassium ions which is such an essential part of the whole subject. Those who were present at the lecture will remember that during the evening a number of photographs of flowers, etc. were taken with the new camera and some of these are reproduced in the centre pages."
Scarce both in the marketplace and institutionally, with no copies of the offprint noted as of this listing.