254 



INDEX TO L. CASELLA'S CATALOGUE. 



Models in Wire, 2422 to 2424. 



Wood, 2415 to 2419, and 2425. 



of Crystals, 2410 to 2414. 



Diamonds, 2420. 



Steam Boats, 2467 to 2473. 



Engines, 2433 to 2465. 



Optical, 1578 and 1579. 



Snowing Principle of Screw and 



Nut, 2388. 



Moffatt's, Dr., Ozonometer, 90. 

 Mohr's Burettes, 2695 and 2696. 



Pinchcocks, 2653. 

 Montgolfier's Hydraulic Ram, 2272. 

 Moonlight Compasses, 474 and 475. 

 Mountain Barometer, Gay Lussac's, 16. 

 Standard, 15. 



Sympiesometer, 123. 

 Mouth Mirrors, 2594 to 2596. 



N 



Napier Compasses, 767 and 768. 

 Natural Loadstone, 2027 and 2028. 



Standard, or Independent Ther- 

 mometer, 23. 

 Navy Signals for Telescopes, 1358. 



Telescopes, 1353 to 1360. 

 Needle Director, 2130. 



Pricker, 785. 

 Needles for Ships' Compasses, 933. 



Magnetic, 2014 to 2022. 

 Neomonoscopes, 1556 to 1558. 

 Note Book, or Meteorological Register, 



Strachan's, 96. 



Nicholson's Gravimeter, 2557 and 2558. 

 Nitrogen Bulb, Horsford's, 2780. 



Object Glasses for Microscopes, 1168 to 



1197. 



Object Glasses for Telescopes, 1424 to 1452. 

 Objects for Gas Microscope, 1833. 



for Polariscope, 1820. 

 Occhiombras, 1040. 

 Oersted's Experiments, Apparatus for, 



2162 to 2164. 



Offset Scales, 547, 548, 558 to 560. 

 Oleometer, 2530 and 2532. 

 Opaque Screen, 1839. 

 Opera Glasses, Binocular, 1457 to 1495. 

 Single, 1453 to 1456. 

 Three-Change,1509 to 1517 

 Opiesometer, or Map Metre, 516 and 787. 

 Opthalmoscope, 1577 and 2586. 

 Optical Diagonal Mirror, 1574. 

 Model, 1579. 



of Pyramid, 1578. 

 Optical Squares, 435. 

 Optometer, 1580. 



Ordnance Maps of England and Wales, 

 2836. 



Ordnance Maps of London, 2837. 



Orreries, 2832 and 2835. 



Oven, Hot Oil, 2733 and 2734. 

 Thermometers, 254 and 255. 

 Water, 2729. 



Oxy-calcium, Light Apparatus, 1822 to 

 1829. 



Oxy-hydrogen Dissolving ^View Appara- 

 tus, 1816. 



Microscope, 1817. 



Ozone Cages, 92 and 93. 



Ozonometers, 89 to 91. 



Forms for, 94. 



Pallets, 2890. 



Pantometres, 434 and 434*. 



Paper, Carbonic or Transfer, 2859 and 2860 



Drawing, 2838 to 2848. 



Filtering, Chemical, 2770 and 2772. 

 Photographic, 1723 and 

 1724. 



Oiled Royal, 2862. 



Photographic, 1780 to 1784. 



Tracing, 2849 to 2858. 



Continuous, 2858. 



French, 2857. 

 Parabolic Reflector, 1207. 

 Paraboloid, 1274. 

 Paradox, Hydrostatic, 2265. 

 Parallel Rules, 635 to 655. 

 Parting Glasses or Sinking Phials, 2548. 

 Pedestal Thermometers, 205 to 208. 

 Pedestals for Aneroid Barometers, 109. 

 Pedometers, 124 and 125. 

 Pencil or Ink Bows 774 and 775. 

 Pencils, Black-lead, 2864 and 2865. 



Bow, 773. 



Wolff's Creta Lsevis, 2867. 

 Pens, Bordering or Colouring, 780. 



Bow, 773. 



Dotting or Wheel, 784. 



Drawing, 778, 779 and 788. 



Lithographic, 782. 



Mapping, 789. 



Railway or Road, 783. 



Steel, 2868 and 2869. 

 Pentagraphs, 596 to 600. 

 Pepys's Blow-Pipe, 2716. 



Gas Holders, 2656 and 2657. 

 Perambulators, 513 to 515. 

 Pocket, 516. 



Pestle and Mortar, Glass, 1764. 

 Pestles and Mortars, 2760 to 2763. 

 Phantasmagoria Lanterns, 1808 to 1810* 

 Phantoscope, 1564. 



