A doctor and patient demonstrating the use of an electricity machine to produce an escharotic spark against enlarged tonsils. From Samuel H. Monell’s High frequency electric currents in medicine and dentistry, 1910
Exploded and dissected skulls. Beauchene Skull - Mounted preparation of human skulls were used to demonstrate better views of separate cranial bones. 19th Century. The above images, I presume, were most likely prepared and mounted by RMC.
Cellulose nitrate was used to make dice from the late 1860s until the middle of the twentieth century, and the material remains stable for decades. Then, in a flash, they can dramatically decompose. Nitric acid is released in a process called outgassing. The dice cleave, crumble, and then implode.
From Dice: Deception, Fate & Rotten Luck by Ricky Jay and Rosamond Purcell, 2002.