Catalogs are an excellent indication of when a model was produced or discontinued. This chart was developed by Ed Chamberlain to help determine the date of manufacture, but one must first zero in on which period the slide rule was made.
“It was easy for me to be who I am and hopefully others can be who they are as well.”Delle Donne had shied away from questions about her dating life in the past, but in recent months she has been more open about sharing her personal side through pictures and posts on social media, many of which have featured Clifton.“I decided I’m not at all going to hide anything,” Delle Donne said.Found on manuals and other slide rule ephemera: 1909 - Copyright Act on published works passed by Congress. 1951 - 3 digit Area Codes in Phone numbers implemented by AT&T (Developed in 1947). 1897 New York Blueprint Paper is founded by Charles Bruning in January. The common rules were produced in regular batches but the specialty rules did not sell as well and a given batch of rules might stretch over several years.COPYRIGHT XXXX and XXXX 1943 - 2 digit Postal Zone codes to increase efficiency of delivery because of a wartime shortage of staff. 1963 - The use of 5 digit Postal Zip Codes in USA addresses adopted but not mandantory. 1898 After a fire, Bruning rebuilds the New York Blueprint Paper Co., only to close it and return to Chicago. It is not uncommon to find rules in the 1960s in 68 xxxx series packaging but 4000 series model numbers on the rules. Many hours searching for surnames that apply to Surnames listed above. Sir Dunning was a traitor to his Saxon heritage and was appointed by the Norman invaders as the first Norman Lord of Lathom. He married Marigard ESSEX, at The Chapelry of Lathom, Lathom, Lancashire, England;2 died at Lathom House, Lathom, Lancashire, England; The Lathom House, the Chapelry of Lathom, and the town of Lathom itself would later become a part of the city of Ormskirk, Lancashire, England; buried at Chapelry of Lathom, Lathom, Lancashire, England.