Table I
Densities of the Roubles (Measured in Ethanol) at Room Temperature
| Year | 1828 | 1830 | 1834 | 1835 |
| Mass in air, g | 10.3549 | 20.7039 | 10.1612 | 10.3120 |
| Mass + wire in liquid, g | 10.3727 | 20.3061 | 10.1845 | 10.3136 |
| Mass of wire in liquid, g | 0.4017 | 0.4017 | 0.4017 | 0.4017 |
| Real mass in liquid, g | 9.9710 | 19.9044 | 9.7828 | 9.9119 |
| Difference, g | 0.3839 | 0.7995 | 0.3784 | 0.4001 |
| Volume, cm3 | 0.4868 | 1.0138 | 0.4798 | 0.5074 |
| 21.27084 | 20.42163 | 21.17633 | 20.32503 | |