Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.
"Hans Zinsser" (1878-1940) received his doctorate at Columbia University and also was an instructor of bacteriology at Columbia University. Throughout his career he was also a professor at Stanford University as well as Harvard University. His scientific work focused on bacteriology and immunology and he is greatly associated with Brill's disease as well as typhus.