Circa dating system
The tubular beam is of a smaller diameter than that of the R2 below but considerably larger than that of the R6. The 26/R4 (3 section) and 26/R5 (4 section) compasses were similar for 1.5 and 2 metres max.radius respectively and Riefler advertised they could supply 26 series beam compasses for up to 3 metres radius. When unscrewed from the pen, a pricker is revealed on the end of the handle.
The “Round System” of compasses, for which the firm is famous, was patented by his son Sigmund in 1877.But, even as it grew, people continued to use other systems like the Roman calendar. C.) and so mentions years “before the incarnation of our Lord.” Another religious writer, this one a French Jesuit named Dionysius Petavius (a.k.a. A century or so after Petavius’ work, Isaac Newton wrote a chronology in which he used Petavius’ system—but with a slight change in the wording, using “before” rather than the Latin “ante.” “The times are set down in years before Christ,” Newton wrote, but he didn’t use abbreviations. “You get used to a certain way of doing things,” she says.Denis Petau), used the idea of in his 1627 work De doctrina temporum. “The hinge idea, that there’s before Jesus and after Jesus really only takes root in the 17th and 18th century,” Hunt says. Aas some people stripped the terms of some of their religious connotations by using BCE (“before the common era”) and C. “It’s quite similar to the problem of the metric system, which is invented in the 18th century and took a very long time before it could be taken up even in France.It also includes an unusual pattern of drop bow compass, a road pen and a curved line pen.Under a flap in the lid there is an excentrolinead (for drawing spokes in a wheel, etc.). A superb 1930s set with a 20 inch beam compass, dotting pen to fit it and another dotting pen for use with the six inch compass.