This Book contains more than 20 additional b/w images of the telescopes & equipment exclusive to this volume. The 1874 transit of Venus, which took place on 9 December 1874 was the first of the pair of transits of Venus that took place in the 19th century, with the second transit occurring eight years later in 1882. This volume is an excellent addition to any Astronomy library, and is a valuable historic reference book.