926 APPENDIX. 



881. 2. EUipsometer. Before the eye- piece of the glass, a 

 doable refracting prism is made to turn until a wire, moving per- 

 pendicularly to the principal section of the prism, gets to pass 

 through the two intersecting points of the two reflections of the 

 ellipse. An index shows at the moment the position of the 

 prism. 



896. New Optometer, with double-refracting lens of calc- 

 spar, giving double readings, and greater precision in determining 

 the distance of sight. Professor Carl Wenzel Zenger, Prague. 



Pyrites, burnt ore, burnt ore ground and mixed with salt, burnt ore after 

 furnacing, burnt ore after lixiviation, " purple ore," brick of purple ore, strong 

 copper liquor, waste copper liquor, copper precipitate, iodide of zinc, iodide of 

 silver, silver precipitate. (Widnes Metal Co.) 



Salt, saltcake, Hargreave's process. (Mr. Sullivan & Co.) 



Nitre, sal enixum or nitre cake, vitriol. (Messrs. Muspratt & Sons.) 



Salt, saltcake. (Messrs. Sullivan & Co.) 



Hydrochloric acid. (Messrs. Mathieson & Co.) 



Limestone, slack, black ash, vat liquor. (Messrs. Sullivan & Co.) 



Waste before oxidation, waste after oxidation, sulphur liquor, precipitated 

 sulphur, melted sulphur, roll and bulk. (Messrs. Hutchinson & Co.) 



Salts, soda ash. (Sullivan & Co.) 



Caustic soda ash. (Muspratt & Sons.) 



Refined alkali, soda crystals, mother liquor. (Gaskell, Deacon, & Co.) 



Bicarbonate of soda, ground and unground. (Hutchinson & Co.) 



Bed liquor, oxidised red liquor, causticised red liquor, cream caustic soda, 

 white caustic soda, 60 per cent., white caustic soda, 70 per cent. (Gaskell, 

 Deacon & Co.) 



Peroxide of manganese, chloride of manganese, mud before and after 

 blowing, limestone dust, lime, dressed lime, bleaching powder. (Mathieson 

 & Co.) 



Chloride of calcium. (Gaskell, Deacon, & Co.) 



Muriate of potash, milk of lime, solution chlorate of lime, first crystals, 

 chlorate of potash, finished crystals, chlorate of potash, ground chlorate of 

 potash, first mother liquor, last mother liquor. (Muspratt & Sons.) 



Alkaline silicate of soda, silicate of soda, silicate of potash, solution alkaline 

 silicate of soda, solution silicate of soda, solution silicate of potash. (Gossage 

 & Sons.) 



940. Photographic Prints, in ink. 



Mr. Thiel Aine, Paris. 



CLASS THE IST. 



1. Reproduction of water-colour painting A cow, after Troyou.^ 



2. chalk drawing Park of the Marquis de Megrigny, 



after Lalanne. 



3. chalk drawing An old courtyard at Coloinbes, after 



Lalanne. 



4. oil painting The Resurrection, after Lazerges. 



5. chalk drawing Borders of the Rhine at Mulhouse, 



after Niederhaus;en. 



6. chalk drawing Ruins of a temple, after Lalaune. 



7. oil painting Presenting the Bride, after de Boucher- 



ville. 



