Fig. 48. An X-Ray made in 1896, only a year after the process had been discovered. 

Spectre pointing. 1863.

Lunar surface. 1881.

Lunar surface: Sabine, Ritter, Arago craters by morning light. Johann Nepomuk Krieger. 1898.

Imaginary view from the surface of Saturn showing a couple of its rings in the sky. 

Swimming Lessons. 1846.

Marvels of the Sky. 

1886

Gardell Dano Christensen. Rare Okapi. Magazine cover detail. 1937.

1870

Fig. 86. 1891.

Pío del Río-Hortega (1882-1945). Published 1948.

1908

Men’s open-air swimming bath, King’s Meadow, Reading, U.K. 1918

c. 1883