CATALOGUE. — PHTSICAL OPTICS. 



257 



Index of refraction. 

 Solution of [)otash. C. - 1.390 



Nitric acid, sp.gr. 1.48. W. 1.410 



Nitric acid. C. - 1.412 



Fluor spar. W. - 1.433 



Sulfuric acid. W. - 1.435 



C. - - (1.426) 



Spermaceti, melted. W. - 1.446 



Crystalline lens of an ox. W. 1.447 



(to 1.380) 



C. (1.463) 

 Oil of wax. C. - 1.452 



Alum. VV. - - 1.457 



C. - - 1.458 



Tallow, melted. W. - 1.460 



Borax. C. - - 1.467 



Oil of lavender. W. - - 1.467 



C. (1.469) 

 Oil of peppermint. W. 1.468 



Oil of olives. W. - - 1.469 



C. - (1.465) 



Oil of almonds. W. 



Oil of turpentine, rectified. W. 1.470 

 Oil of turpentine, common. W. 1.476 



C. (1.482) 

 Essence of lemon. W. - 1.476 



Butter, coW. W. - - 1.480 



Linseed oil. W. - 1.485 



Camphor. W. - - 1.487 



C. - (1.500) 



Iceland spar, weakest. W. 1.488 



strongest. W. (1.657) 

 Taflow, cold. W. - 1.49 



Sulfate of potash. W. - 1.495 



Oil of nutmeg. W. - 1.497 



French plate glass. W. 1.500 



English plate glass. W. 1 .504 

 Oil of amber. VV. - 1.505 



C. - (1.501) 



Balsam of capivi. W. - 1.507 



Gum Arabic. W. - 1.514 



VOL. II. 



Index of refraction. 



Gum arable. C. - (1.477) 

 -Human cuticle. VV. 



Dutch plate glass. W. 1.517 

 Gum lac. W. 



Caoutchouc. W. ' 1.524 



Nitre. C. - 1.524 



Selenite. W. - - 1.525 



Crown glass, common. W. 1 525 



Canada balsam. VV. - 1.528 



Centre of the crystalline of fish, 



and dry crystalline of an ox. W. 1.530 

 Pitch. W. 



Crown glass, sp. gr. 2.52. C. 1.532 

 Yellow plate or Venetian glass, 



sp. gr. 2.52. C. 1.532 



Brazil pebble, sp. gr. 2.62. C. 1.532 



RadcUffe crown glass. W. 1 533 



Anime. W. - 1.535 



Copal. VV, - - 1.535 



Oil of cloves. W. - 1.535 

 White wax, cold. W. 

 Elemi. W. 

 Mastic. W. 



Arseniate of potash. W. 

 Sugar, after fusion. VV. 



Sugar, 1, water 27. C. - (1.346) 

 Spermaceti, cold. W. 

 Red sealing wax. VV. 



Oil of sassafras. W^. - 1.536 



C - (1.544) 



Bees wax. W. - - 1.542 

 Boxwood. VV. 



Colophony. W. - 1.543 



Glassof St. Gobin. C. - 1.543 



Old plate glass. \V. - 1.345 



Rock crystal (double). VV. , 1.547 



C. C (1.568) 

 C (1.575) 



Amber. W. 1.547 



C. (1.556) 



