Magdeburgh Hemispheres Small 130×320 Medium 260×640 Large 416×1024 Download Tiff Original 976×2400 | (409.9 KB) Description "When placed together after the air has been taken out, it will take two very strong men to pull apart." -Comstock 1850 Keywords hemisphere, magdeburgh, Vacuum Galleries Chemistry Concepts and Lab Experiments Source: J. L. Comstock A System of Natural Philosophy: Principles of Mechanics (: Pratt, Woodford, and Company, 1850) 146
