546 



CENTBAL SCIENTIFIC CO., CHICAGO, U. 8. A. 



Push Buttons for Electric 



Bells 81 



Pycnometers 24, 104, 105 



Pyrex Glass Combustion 



Tubes 163. 297 



Pyrex Glass Combustion Tub- 

 ing 297 



Pyrex Glass Flasks 244-249 



Pyrex Glass Test Tubes 488 



Pyrometers, All Kinds. .. .417-423 

 Pyroscope, Shore's Pyrometer 422 



Quadrant 483 



Quadruple Microscope Lamp. 347 



Qualitative Filters 238-240 



Quantitative Filters 240. 241 



Quartz Apparatus, Transpar- 

 ent 17, 78, 162. 



163, 173, 187, 249. 421. 42R. 488 



Quartz Arsenic Tube 17 



Quartz Beakers 78 



Quartz Combustion Boats. . . . 162 



Quartz Combustion Tubes. . 163 



Quartz Crucibles 173 



Quartz Dishes 187 



Quartz Flasks 249 



Quartz Laboratory Utensils.. 



78. 162. 



163, 173, 187, 249. 421. 428. 488 



Quartz, Pyrometer Tubes 421 



Quartz Retorts 428 



Quartz Test Tubes 488 



Quartz Triangles 505 



Quartz Tubes 163, 488 



Quevenne Lactometers (Hy- 

 drometer) '. . 313 



Quill Handle Brushes 109 



Quinine Bottles 97 



Qulxo Cement 130 



R. R. Alundum 162 



Racks, All Kinds 



243, 350, 362. 



391, 476. 477, 479-481, 517, 519 



Racks, Filter 243 



Racks, Paper 391 



Racks for Soil Tubes 460 



Racks for Staining Slides... 350 

 Rack for Sulphur Apparatus. 476 



Racks for Test Bottles 362 



Racks for Test Tubes 



480, 481. 517. 519 



Radial Burners, Fletcher.... 116 

 Radiation Pyrometers, 



Thwlng 422. 423 



Radio-Active Apparatus. .423-426 

 Radio-Active Minerals... .425. 426 

 Radio-Chemistry Apparatus.. 



423-426 



Radio Microscope Lamps.... 345 



Radiometer 426 



Radioscope 426 



Radium Apparatus 423-426 



Radium Electroscopes ...423-425 



Radium Sninthariscope 426 



Rafter's Counting Apparatus 520 



Rain Gages 273 



Rake, Cupel 182 



Ralston's Still 195 



Rammer for Briquettes (Ce- 

 ment Testing) 133 



Rare Metal Pyrometers. . .417-419 



Rat Tail Files 235 



Ratchet Screw Driver 437 



Rauvier's Dropping Bottles. 99 

 Ravenel Culture Dish Holder 181 



Ravenel Potato Cutter 414 



Raw Materials 524-526 



Rawhide Mallet 335 



Razors. Section 355 



Razor Strops 355 



Reaction Plate 408 



Reader for Burette Meniscus. 113 

 Reading Devices for Ther- 

 mometers 126, 284. 500 



Reading Glasses 61. 335 



Reading Glass for Balances. . 61 

 Reading Lenses for Colony 



Counting 168. 169 



Reading Lens, Thermometer. 



126. 500 



Reagents for Abderhalden's 



Dialyzlng Method 82 



Reagents for Rlowpipiner. ... 94 

 Reagents for Kuttner Micro- 

 Colorimeter 156, 167 



Page 



Reagent Bottles 101-103 



Reagent Bottle Caps 102 



Recalescence Point Apparatus 



263, 271, 417-422 



Receivers for Air Pumps.... 



79, 80, 90, 92. 414 



Receivers, Bell Glass 79. 80 



Receivers and Covers for 



Sieves 441. 442 



Receiver for Distillation in 



Vacuum 426 



Receiver, Paulv's 426 



Receivers for Pressure Blow- 

 ers 90, 92. 414 



Receivers for Retorts 426 



Receptacles for Electrical 



Connections 228 



Reckoner, Nomon 373 



Record Charts for Milk 358 



Recorder for Sunshine 476 



Recorders, Temperature .... 



419. 498. 499 



Recording Barometer 65 



Recording Drum 329 



Recording Pyrometers 419 



Recording Thermometers. 498. 499 



Rectifiers, Electric 219 



Red Fiber Blocks 354 



Red Rubber Tubing 430. 431 



Reducer, Brass 506 



Reducing Gages 274, 275 



Reducing Gear 216 



Reduction Factors for Gas. . . 284 



Reduction Tubes 427 



Reductors. Blair's 427 



Reed's Extraction Apparatus. 231 



Referees' Gas Apparatus. .11. 282 



Reflecting Level. Hand 482 



Reflux Condensers 165 



Refractory Cement. Alundum 130 



Registering Hygrometer .... 317 

 Registering Thermometers... 



495. 497-499 



Regulators, Electric 



318, 320. 500-502 



Regulator. Gas for Auto- 

 claves 28 



Regulators, Gas Pressure.... 294 



Regulators, Gas Tank.... 274. 275 



Regulator. Gas Time 294 



Ree-ulators. Pressure for Gas 



Cylinders 274. 275 



Regulators. Temperature, 



Electric 318, 320, 500. 501 



Regulators, Tolul 501 



Reichert Gas Regulators 501 



Reichert Thermo-Regula tors. 501 



Reimann's Thermometer Bodv 51 

 Relay. DeKhotinsky Iron 



Clad 500 



Renal Functional Apparatus. 156 



Rennet Tester. Marschall . . . . 362 



Repairs for Galvanometers. . 207 



Repairs for Milk Testers 361 



Reservoir for Pressure Ttlow- 



er 90. 92. 414 



Resistances. Cenco 224 



Resistances, Dodge 226 



Resistances. Non-Inductive . . 227 



Resistances. Standard 223 



Resistance Poxes 220-222 



Resistance Bridges 



222, 223, 403, 455 



Resistance Coils 223 



Resistance of Metals Table.. 528 



Resistance Spools 223 



Resistance Wire 522 



Resistance of Wire Table. . . . 527 



Respirators 427 



Rests for Balances 61 



Rests for Bottles 107 



Rests for Pipettes 406 



Retention Cur,. Water 460 



Retorts, All Kinds 



25. 174. 198. 199. 427. 428 



Retort for Creosote Oil Distil- 

 lation 25 



Retorts. Glpss 427 



Retorts, Kkidmore's 174 



Retorts. Transparent Quartz. 428 



Retort Adapters 9 



Retort Clamps 146 



"Retort Connectors 9 



Retort Receivers 426 



Retort Rings 428 



Retort Stands 477 



Retort Supports 477 



Revolution Counters 



135, 138. 141, 462. 474 



Revolving Nosepleces 348 



Page 



Rheostats 



..214, 224-226, 260. 263, 266. 346 



Rheostats, Battery 214 



Rheostats for Electric Fur- 

 naces 260. 263. 266 



Rheostats for Micro Arc 



Lamps 346 



Ribbed Funnels 257 



Ribbon, Galvanometer Sus- 

 pension 207 



Ribbon Carrier for Micro- 

 tomes 353 



Richards Filter Pumps 242 



Richmond Slide Rule 363 



Rickard's Sputum Shaker.... 439 



Riders for Balances 56 



Rider Weights 51. 56 



Riffle Samplers 432. 433 



Right Angle Clamps 148-150 



Riker Botanical Mounts 95 



Riker Plant Press 96 



Rlker Specimen Mounts 461 



Rings, Concentric 428 



Rings, Copper 428 



Rings, Filter 19 



Rings, Iron 428 



Rings for Micro Slides 34fl 



Rings, Porcelain 428 



Rings, Retort 428 



Rings. Suberlte 168 



Rings for Supports 428 



Ring Burners 20, 118 



Ring Supports 477 



Rip Saw 434 



Ripper's Weighing Burette.. 112 



Road Material Testers 18-25 



Roasting Dishes 188 



Rock Crushers 175 



Rock Crystal Apparatus 



..162, 163. 173, 187, 249. 428. 488 

 Rock Grinders. . .176, 177, 179-181 



Rod, Carbon 524 



Rod, Charging for Electro- 

 scopes 424 



Rod, Fiber 525 



Rods, Gage for Oil 377 



Rod, Glass 29fi 



Rod, Metal, All Kinds 524-526 



Rod, Rubber 626 



Rods, Silica 443 



Rods, Stirring of Glass.. 296, 470 



Rods. Stirring, Nafls' 357. 363 



Rod Clamp 403 



Rod Table, Weight of 528 



Roehrig Extraction Tube. 233. 358 



Roger's Ring Burner 118 



Roger's Sphygmomanometer.. 87 



Rolling Mills 180. 181 



Rope, Manila 428 



Rorrison Oil Thief 379 



Rose Crucibles 173 



Rose Top (Crown) for Bun- 



sen Burner 123 



Rosettes 228 



Ro-Tap Sieve Shaker 443 



Rotarex, Dulln 19 



Rotary Air Pumps 89-91 



Rotary Compressors 89-91 



Rotary Converters 226 



Rotary Microtomes. Spencer's 



. .. .' 352. 353 



Rotating Anode and Stirring 



Apparatus 229 



Rotators, Electric 229, 470 



Rothe Double Automatic Pip- 

 ette 404 



Round Levels 333. 334 



Roux Culture Tube 48S 



Roux Gas Regulator 501 



Roux Thermo-Regulator. Bi- 

 metallic 501 



R. R. Alundum 162 



Rubber Bags 279. 282. 428 



Rubber Balloons 63 



Rubber Bands 428 



Rubber Battery Syringe.. 71. 313 

 Rubber Block for Platinum 



Combustion Boats 40S 



Rubber Bottles 103 



Rubber Bottle Rests 107 



Rubber Bulbs 88, 279, 428 



Rubber Bulbs for Constant 



Blast 88 



Rubber Bulbs for Dropping 



Bottles 428 



Rubber Bulbs for Gas Appa- 

 ratus 279. 428 



Rubber Bulb Expander 431 



Rubber Caps for Test Tubes. 428 

 Rubber Cloth Aprons 14 



