Which properties of gases did Henry Cavendish measure in his early experiments?

In his early research on "factitious airs," Henry Cavendish conducted rigorous quantitative experiments to measure several key properties of gases. Specifically, he measured the following:

• Solubility: He determined how well different gases dissolved in water.1
• Specific Gravity: He calculated the relative density of the gases.1
• Combustibility: He observed and noted the flammable nature of the gases he produced.1

To perform these measurements, Cavendish collected gases in bottles inverted over water or mercury. His work was characterized by the use of standardized instruments and a commitment to reproducible results, which allowed him to identify and account for potential sources of error in his experiments.1