“Device used for measuring the velocity of the wind.” -Comstock 1850
J. L. Comstock A System of Natural Philosophy: Principles of Mechanics (: Pratt, Woodford, and Company, 1850) 207
1343×2400, 543.1 KiB
573×1024, 89.7 KiB
358×640, 43.4 KiB
179×320, 17.6 KiB