"....relies on a vastly expanded foundation of primary source material, including thousands of pages of handwritten patient records, lecture notes, unpublished essays, and letters.... "Laennec’s famous Treatise on Med…
"The definitive history of a technology that was used in research and practice in Europe and America beginning with the invention of the sphygmograph by German physiologist Karl Vierordt in 1854" (W. Bruce Fye).