INDEX TO VOLUME I, 



393 



Lever and stand for weighing a 



column of air, 204 

 Leyden jar, 260 

 Lifting pump, 233 

 Lightning conductors, 308 310 

 Luminous crescent, 292 

 Luminous discharger, 291 

 Luminous word, 292 

 Lungs glass, 206 



Magdeburg hemispheres, 203 

 Magic picture, 271 

 Mariner's compass, 52 

 Mathematical instruments, 11 

 Measuring wheel, 49 

 Mechanical powers, 145 150, 



151 



Medical electricity, 315 

 Medical electrical machine, 312 

 Medical electrometer, 267 

 Medical jar, 266318 

 Mercury shower, 211 

 Motion, mechanics, &c., 142 

 Movable coatings, 270 



Needle holder, 20 

 Needle point instrum., 22 

 Nicholson's balance, 227 



Oleometer, 229 



Pantagraph, 46 



Parallel rule, 36 



Perambulator, 49 



Phosphorus cup, 286 



Pillar compasses, 27 



Pins for drawing, 26 



Pith ball electrometer, 261 



Plain compasses, 15 



Plane scale, 28 



Plane table, 58 



Planetarium, 110 



Planetarium improved, 113 



Plate electrical machines, 246 



Platina point, 310 



Plumb and spirit level, 59 



Plumb bob, 50 



Pocket compasses, 50 



Pocket compass, gilt, 52 



Pocket sextant, 74 



Pocket spirit level, 88 



Porous cells, 333 



Powder cup, 342 



Powder house, 311 



Pressure gauge, 222 

 Pressure glass, 203 

 Prismatic compass, 56 

 Proportional compass, 22 

 Protractor, 28 

 Pulleys, 146152 



Quadrant, 65 



Quadrant electrometer, 262 



Radiating feathers, 278 

 Rain electroscope, 305 

 Reflecting circle, 75 

 Reflecting goniometer, 98 

 Relative weight of fluids, 230 

 Revolving glass globe, 290 

 Revolving horsemen, 281 

 Ring dial, 137 

 Road pen, 18 

 Rocking horse, 145 

 Rolling glass balls, 285 

 Rotating bell glass, 288 



Scales and weights, 224 



Screw, 150157 



Screw press, 159 



Sector, 32 



Series of insulated jars, 302 



Set of spirals, 292 



Sextant, 69 



Single barrel air-pump, 195-197 



Sliding rod receiver, 213 



Smee's battery, 337 



Sphere and point, 298 



Spiral and Flyer, 290 



Spirit level, 88 



Spotted jar, 293 



Spouting fluids, 239 



Spouting tube, 204 



Spiral tube, 291 



Spring steel bow dividers, 22 



Stand for the fusion of wire, 297 



Sulphur cone, 272 



Sun dial, 135 



Surveyors' compass, 60 



Surveyors' compass, small, 63 



Survey ors' cross, 60 



Surveyors' instruments, 49 



Surveying, level, common, 90 



Syphon, 231 



Tantalus cup, 232 

 Tape measure, 50 

 Tellurium, 114 



