VALEURS DE

MILIEU RÉFRINGENT.

-® | 2© | 40 | 4@ | ® | #@ | Lan 1.525832|1.526849|1.529587|1.555005|1.556052|1.541657| 1.546566 1.350056|1.551712/1.955597|1.555851|1.557818|1.541295|1.544177 1.350977/1.551700|1.555577/1.555849|1.557788|1.541261|1.544162 1.599029|1.400515|1.402805|1.405652|1.408082|1.412590|1.416568 1.470496|1.471530|1.474434|1.478555|1.481756|1.488196|1.495074 |} 1.602042|1.605800|1.608494|1.614552|1.620042|1.650772|1.640375 1.625570|1.625477|1.650585|1.6037356|1.645460|1.665400|1.666072

1.024512|1.5252090|1.5279602|1.551572|1.554537|1.559908|1.544684 Crown-glas lettre M. . .|2.750{1.654774h1.5689351.58g078l1.563160[1.506741|1.075558|1 579470 F0 an À - -724/1.626596/1.628469|1.655667|1.60405|1.646756/1.658848|1.669686

Flint-glass no 25, | Prisme de 45° 25! 141.

Elint-glass n°13. . : . .]5.723 1 Crown-glass n°9 . . . 2.555 RASE NS I ST 00

Eau (d’après une autre expére).[ 1.000 PIRE EEE à TOR FA AR GE UE

4] Solution de potasse. : + .lr.416 1! Huile de térébenthine . . .10.885 Flint-glass ne 3. >, . [3.512 Elint-glass n° 50. . .: . .15.695

EE ee ne ! Crown-glass n° 13 . . . .|2.555