INDEX TO VOLUME II. 



291 



Lamp stands, 72 



Laughing gas, 80 



Lead tubes, 66 



Lenses, 179 



Leslie's hygrometer, 141 



Lever sliders, 217 



Liud's wind gauge, 144 



Linen prover, 173 



List of microscopic objects, 263 



Lockey's coil machine, 37 



Lucernal microscope, 211 



Magic circle, 14 

 Magnetic discs, 9 

 Magic lanterns, 149 

 Magnetic beam engine, 31 

 Magnetic engine, 33 

 Magnetic instruments, 5 

 Magnetic needles, 6 

 Magnetic swan, 10 

 Magnetic toys, 10 

 Magneto-electric machines, 44 



57 

 Magnet revolving round a wire, 



25 



Magnifiers, 168 

 Mantel thermometers, 114 

 Marsh's arsenic apparatus, 105 

 Marsh's vibrating wire, 20 

 Marine barometer, 123 

 Mason's hygrometer, 135 

 Matrass, 61 



Medical magnetic instrument, 51 

 Meniscus lens, 179 

 Meteorological instruments, 110 

 Microscopes, 222 

 Microscopic sliders, 246 

 Military telescopes, 177 

 Models of the eye, 180 

 Mortar and pestle, 71 

 Mountain barometer, 121 

 Movable sliders, 217 

 Movable wires for attraction. 35 

 Multiplying glass, 193 

 Muscles of the eye, 182 



Natural history sliders, 219 

 Nature of vision, 181 

 Nichol's prism, 195 

 Nitrous oxyde gas, 80 

 North's apparatus, 104 

 Numeral frame, 267 



Oat beard hygrometer, 129 



Objects for the microscope, 246 

 Oersted's experiment. 16 

 Opaque solur microscope, 242 

 Opera glass, 174 

 Optical diagonal machine, 185 

 Optical instruments, 149 

 Oxygen gas, 81 



Oxy-hydrogen microscope, 245 

 Oxy-hydrogen polariscope, 202 



Page's revolving armature, 28 

 Page's revolving magnet, 30 

 Pebbles for spectacles, 151 

 Pepys' gas transferrer, 101 

 Periscopic glasses, 151 

 Phantasmagoria lantern, 204 

 Pictet's apparatus, 98 

 Pike's mountain barometer, 122 

 Pike's rotary magnetic machine, 



Pike's thermometer, 111 



Pipette, 67 



Plain barometer, 119 



Plano-convex lens, 179 



Pneumatic trough, 75 



Pocket thermometers, 112 



Polariscope, with selenite de- 

 signs, 199 



Polarization of light, 194 



Polarization by bending a glass 

 plate, 200 



Polemoscope, 192 



Porcelain retort, 61 



Porcelain tubes, 66 



Portable linen prover, 174 



Portable magnetic machine, 49 



Potash apparatus, 109 



Precipitating glasses, 64 



Preparation of gases, 79 



Prism, 182 



Prism for double refraction, 194 



Prognosticator, 127 



Pulse glass, 91 



Pyrometer, 94 



Rack astronomical sliders, 218 

 Radiation of heat, 98 

 Readers, 159, 163, 154 

 Recomposition of light, 183 

 Reflectors for radiating heat, 98 

 Regulator for modifying galvanic 



shocks. 39 

 Retort, 61 

 Retort receiver, 63 



