Georgian literary sources for Late Antiquity are commonly held to be later productions devoid of historical value. As a result, scholarship outside the Republic of Georgia has privileged Graeco-Roman and even Armenian narratives. However, when investigated within the dual contexts of a regional literary canon and the active participation of Caucasia’s diverse peoples in the Iranian Commonwealth, early Georgian texts emerge as a rich repository of late antique attitudes and outlooks. Georgian hagiographical and historiographical compositions open a unique window onto a northern part of the Sasanian world that, while sharing striking affinities with the Iranian heartland, was home to vibrant, cosmopolitan cultures that developed along their own trajectories. In these sources, precise and accurate information about the core of the Sasanian Empire-and before it, Parthia and Achaemenid Persia-is sparse; yet the thorough structuring of wider Caucasian society along Iranian and especially hybrid Iranic lines is altogether evident. Scrutiny of these texts reveals, inter alia, that the Old Georgian language is saturated with words drawn from Parthian and Middle Persian, a trait shared with Classical Armenian; that Caucasian society, like its Iranian counterpart, was dominated by powerful aristocratic houses, many of whose origins can be traced to Iran itself; and that the conception of kingship in the eastern Georgian realm of K’art’li (Iberia), even centuries after the royal family’s Christianisation in the 320s and 330s, was closely aligned with Arsacid and especially Sasanian models. There is also a literary dimension to the Irano-Caucasian nexus, aspects of which this volume exposes for the first time. The oldest surviving specimens of Georgian historiography exhibit intriguing parallels to the lost Sasanian Xwadāy-nāmag, The Book of Kings, one of the precursors to Ferdowsī’s Shāhnāma. As tangible products of the dense cross-cultural web drawing the re

This is a print on demand publication. A study of the inventor Reginald A. Fessenden who was born in 1866 in Canada. Although the core of his more public fame rests on his seminal contributions to wireless, the more than 200 patents he was granted cover an amazing range. In addition, Fessenden developed the concept of what is today termed amplitude modulated (AM) radio. He produced and improved upon equipment to demonstrate the principles involved, being the first individual to transmit voice and music over the air. He was the first to establish consistent two-way wireless commun. across the Atlantic Ocean. In the course of his wireless work, he was granted a patent for use of the heterodyne principle that became so important in the vacuum tube era of radio and beyond. Illus.