“The actual position of the vertical object a, as painted on the retina, is therefore such as is represented by the figure.” -Comstock 1850
J. L. Comstock A System of Natural Philosophy: Principles of Mechanics (: Pratt, Woodford, and Company, 1850) 243
2400×946, 185.6 KiB
1024×403, 31.1 KiB
640×252, 16.8 KiB
320×126, 6.9 KiB