290 



INDEX TO VOLUME II. 



Davy's safety lamp, 90 

 Day and night thermometer, 113 

 Deflagrating jar and spoon, 89 

 Deflagrating ladle, 90 

 De la Rive's ring, 11 

 Differential thermometer, 128 

 Dipping needle, 7 

 Dissected cone, 269 

 Dissolving views, 214 

 Distillation and condensation, 



102 



Double convex lens, 179 

 Double eye-glasses, 160 

 Double lens eye-glass, 171 

 Double refraction by mechanical 



force, 199 

 Double refraction by unequal 



heating, 200 

 Downward conducting power of 



fluids. 95 



Draughtsman's camera, 187 

 Drying tubes, 109 

 Dr. Black's furnace, 74 

 Dropping tube, 67 

 Dr Bird's inversor, 39 



Ear trumpet, 269 

 Electro magnet, 13 

 Electro-magnetic globe, 20 

 Electro-magnetic instrum., 11 

 Electro-magnet, with 3 poles, 24 

 Engraver's eye-glass, 170 

 Equivocal or spontaneous gene- 

 ration, 253 

 Ether jet, 89 

 Eudiometer, 100 

 Evaporating dishes, 69 

 Expansion of metal by heat, 93 

 Eye-glasses, 157 

 Eye-protectors, 156 165 



Fine steel spectacles, 154 

 Fire syringe, 95 

 Flexible gas bag, 78 

 Flexible tubes, 66 

 Floating coil, 12 

 Flower microscope, 222 

 Flameless lamp, 90 

 Flasks, 60 

 Focus of a lens, 179 

 Folding eye-glasses, 162 

 French movable sliders, 218 

 Funnels, 64 



Galvanometer, 17 

 Galvanometer, with astatic nee- 

 dle, 18 



Gas bubbles, 77 

 Gas holder, 78 

 Gasometer, 81 

 Geometrical solids, 267 

 Glass-blower's table, 106 

 Glass box for refraction, 184 

 Glass retort, 61 

 Globe receiver, 63 

 Glass syringe, 101 

 Glass tubes, 66 

 Goggles, 165 167 

 Galilean telescope, 176 

 Gold leaf galvanoscope, 19 

 Gould's pocket microscope, 235 

 Graduated bell glass, 65 

 Graduated glass jar, 65 

 Graduated magnetic machine, 51 

 Graduated measure glasses, 65 

 Graphic mirror, 190 

 Gurney's blowpipe, 86 



Hand magnifier, 171 

 Hand spectacles, 161 

 Hearing trumpet, 269 

 Helix on stand, 15 

 Horizontal bell engine, 35 

 Horse-shoe magnet, 5 

 Hope's eudiometer, 100 

 Howard's differential thermome 



ter, 128 



Hydrogen gas, 79 

 Hydrogen gas generator, 88 

 Hydrogen gas pistol, 88 

 Hydrogen lamp, 87 

 Hygrometers bycondensation,130 



Image on the retina, 181 

 Improved comnound microscope, 



231 



Insect microscope, 223 

 Inclosed magnetic instrument for 



shocks, 55 

 Infusoria, 251 

 Iron retort, 62 

 Iron rod supported in the air, 14 



Jones' hygrometer, 141 



Knight's assay lamp, 72 

 Knight's furnace, 73 



