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.
Elias Loomis (1811-1889) was an American mathematician and author known for his contributions to the field of mathematics. Loomis's expertise in trigonometry and mathematical analysis is evident in his works, which have been instrumental in advancing mathematical knowledge. His dedication to education and research has left a lasting impact on the academic community, making him a respected figure in the realm of mathematics.