540 



CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 



Page 



Harvard Trip Balance 64 



Hasselbalch Gas Electrode.. 398 



Hatchet 306 



Heads for Centrifuges 



134, 136. 138-142 



Heat Absorption Apparatus.. 446 



Heat Gages 417-423 



Heat Treating Furnaces. 263. 271 

 Heaters, Electric, All Kinds 



233, 234. 305-310. 360 



Heaters, Electric (Hot Plates) 



308-310 



Heaters, Electric Coll 306. 307 



Heaters. Electric for Milk 



Testers 360 



Heaters, Extraction Appara- 

 tus 233. 234 



Heaters for Flasks 250 



Heater for Flasks, with Hot 



Plate 306 



Heaters for Soldering Irons. . 118 

 Heaters, Water, Instantane- 

 ous 307. 308 



Heating Devices for Incuba- 

 tors 321. 322 



Heating TTnits, DeKhotinsky 



Standard 307 



Heating Wire 



260. 261, 263, 266, 267, 522 



Heavy Beakers 78 



Heeren's Ploscope 362 



Hehner's Color Comparator.. 



153. 520 



Hehner's Color Tubes. .. .153. 520 



Hehner's Cylinders 153, 520 



Helm's Animal Cage 12 



Hempel Distillation Flask... 246 

 Hempel Distilling Tube for 



Tar 200 



Hempel Gas Burettes. .. .282, 283 

 Hempel Gas Palladium Tube. 290 



Hempel Gas Pipettes 293. 294 



Hempel-Tutweiler Gas Bu- 

 rette 283 



Hempel-Wlnkler Gas Burette 282 

 Hennlnger-Le Bell's Distill- 

 ing Tubes 200 



Herbariums 96 



Herman Electrolytic Outfit.. 229 

 Hess-Ives Tint Photometer. . 156 

 Hlggln's Water Proof Ink... 201 

 High Range Thermometers.. 491 

 High Resistance Pyrometers 



417-419 



High Speed Turbine Stirrers 



470. 517. 518 



High Temperature Burners.. 119 

 Hlerh Temperature Drying 



Oven 387 



High Temperature Furnace.. 271 



Hierh Vacuum Pumps 415 



Hildebrand's Calomel Elec- 

 trode 397 



Hildebrand's Gas Electrode.. 398 



Hind's Gas Generators 287 



Hinman-Jenklns Gas Appara- 

 tus 282 



Hlrsch Funnels 258 



Hlstologlcal Apparatus for 



Embedding 354. 392-395 



Hitrhens Svrlnge 486 



Hoffmann Clamps 146. 148 



Hoffmann Lecture Apparatus. 332 



Hoffmann Water Bath 517 



Hogarth Specific Gravity Bot- 

 tle 104 



Hoist for Soil Tubes 454 



Holders, Animal 12, IS 



Holders for Charcoal 93 



Holders for Conductivity Cells 397 



Holders for Crucibles 174 



Holders for Culture Dishes.. 181 



Holders for Cupels 94 



Holders for Dishes 181 



Holders for Extension Clamps 148 

 Holders for Gas. .282. 285, 286, 288 

 Holders for Microtome Knives 365 



Holders for Needles 190. 326 



Holders for Petrl Dishes.... 181 



Holders for Slides 256,350 



Holders for Test Tubes 



146, 147, 480. 481 



Holders for Tools 503, 504 



Holders for Triangles 605 



Hollard's Platinum Electrodr 410 



Holman's Current Slide 349 



Holman's Siphon Slide 349 



Homeopathic Vials 99 



Hones 354 



Honing Backs 855 



Page 



Hooks and Chains 190 



Hooks, Collar 149 



Hooks, Screw 438 



Hopkins Connecting Bulb 



Tube 371 



Hopkins Distilling Tube 371 



Hopkins Kjeldahl Connecting 



Bulbs 371 



Hopkins Limestone Tester. . 460 

 Hopkins Reflux Condenser. . 165 

 Hopkins Vaccine Tubes ..138, 141 



Horismascope 608 



Horn, Gold Washing 298 



Horn Pan Balance 48 



Horn Scoops 436 



Horn Spatulas 461 



Horn Spoons 462 



Hortvet Distilling Apparatus 199 



Hortvet Tube 475 



Hose, Rubber 430,431 



Hose Connectors 308 



Hosklns Chromel Triangles 



606 



Hoskins Electric Combustion 



Furnaces 260 



Hosklns Electric Crucible 



Furnaces 263 



Hosklns Electric Hot Plates 



309, S10 



Hoskins Electric Muffle Fur- 

 naces 263. 266 



Hosklns Pyrometers 421 



Hot Air Blast, Electric 88 



Hot Air Ovens 383-388 



Hot Air Sterilizers 466-4BS 



Hot Blast Blowpipes 93 



Hot Plates. Electric 308-310 



Hot Plate with Flask Heater. 30* 



Hot Plates, Gas 117, 310 



Hot Plates, Sand 434 



Hot Water Funnels 25 



Hour Glasses 434 



Household Still 195 



Household Thermometers . . . 494 

 Hubbard Specific Gravltv 



Bottle 24, 104 



Huber Warming Table S^n 



Hughes Electric Ovens 382 



Hulett Mercurv Still 191 



Huyghenlan Eyepieces 344 



Hydro-Carbon Burners .... 



121. 122, 264, 260 



Hydrogen Balloons 63 



Hydrogen Determination Ap- 

 paratus 277 



Hydrogen Gas 274 



Hydrogen Gas Generators 287, 288 

 Hydrogen Ion Concentration 



Apparatus 86 



Hydrogen Ion Determination 



Apparatus 277 



Hydrogen Sulphide Genera- 

 tors 287 



Hydrogen Sulphide Testers. . 



281 282 

 Hydrometers,' All Kinds.'. 311-315 



Hydrometers, Acid 311-313 



Hydrometers, Asphalt 23 



Hydrometers, Battery ....71, 813 



Hydrometers, Milk 313, 314 



Hydrometers. TTrlne 510 



Hydrometer Carrying Case.. SI 4 



Hydrometer Jars 183, 610 



Hydrone 2 



Hydrostatic Balance 357 



Hydrotimeter 315 



Hvgrodelk 316 



Hvgrograph 317 



Hygrometers 315-317 



Hygrometers, Recording 317 



Hygrometers (Sling Psych- 



rometers) 317 



Hygrometer Wicks, Silk 317 



Hypodermic Needles 486. 486 



Hypodermic Syringes . . . .484, 485 



Ice Bag 317 



Ice Machines 3 



Ice Shaver 817 



Ideal Wire 622 



Ignition Capsules ...127, 129, 162 



Ignition Tubes 163, 427 



Tier Cupel Machine 182 



Illinois Butter Test Bottle. . . 367 

 Illinois Steel Co.'s Collecting 



Tube 286 



Illinois Steel Co.'s Gas Bu- 

 rette 283 



Page 

 Illinois Steel Co.'s Sulphur 



Rack 476 



Illuminating Apparatus, Mi- 

 croscope 345-347 



Illuminating Burners ....117. 366 

 Illuminating Lamps.. 117, 345-347 

 Illuminator, Bull's-Eye Con- 

 denser 345 



Illuminators. Dark Field.... 344 

 Immersion Electric Heaters. 



306, SOT 



Immersion Electrodes 397 



Immersion Oil. Cedarwood... 34. r i 



Immersion Oil Bottles 100 



Imperial Ammeters and Volt- 

 meters 210 



Incandescent Burners 117 



Incandescent Gas Micro Lamp 117 

 Incandescent Lamps. .331, 345-347 

 Incineration Dish, Alundum. 162 

 Incineration Pan, Platinum.. 



162, 409 



Inclinator for Carboys 129 



Incorridible Laboratory Bur- 

 ner 114 



Incubators, Bacteriological.. 



318-325 



Incubators and Parafflne 



Ovens 393-395 



Incubator for Microscopes... 346 



Incubator Heaters 321-322 



Incubator Thermometer 495 



India Rubber Tubing 430. 431 



Indicator, Polarity 228 



Indicators, Speed 462 



Indicators for Speed of Cent- 

 rifuges 135, 138. 141 



Induction Coils 208. 399 



Infusion Kettles 329 



Injection Needles for Syr- 

 inges 485 



Injection Syringes 485, 486 



Injector Burner 119 



Ink, Waterproof Drawing.. 201 

 Ink for Writing on Glass.... 185 



Inoculating Needles 326 



Inocul'tin-r Needle Holder ..326 



Insect Bottles 100 



Insect Breeding Cages 326 



Insect Nets 32 



Insect Spreading Boards.... 328 

 Insect, Perforated, for Water 



Baths 480, 519 



Insplssators, Gas 83 



Instantaneous Water Heaters 



307, 308 



Instruments, Dissecting. . .189-194 

 Instruments, Drawing ...201-203 

 Instruments, Electrical, All 



Kinds 66-76, 205-229, 



233, 234, 254, 260, 261, 263. 

 266, 267, 270, 271, 305-310, 403, 455 

 Instrument Cases. Dissecting 193 



Instrument Sterilizers 465 



Insulated Wire 521, 523 



Insulating Tape 229 



Insulators, Pyrometer Tube.. 



420, 421 



Interchangeable Electroscope, 



Lind 423 



Internal Revenue Hydrome- 

 ters 312 



International Atomic Weights 144 

 International Electric Centri- 

 fuges. .139-141, 142, 360, 446, 447 



Interval Clock 152 



Interval Timer 152 



Invertebrate Dissecting Scis- 

 sors 192 



Inverted Specimen Jars .... 104 

 Iodine Coulometer, Wash- 

 burn's 397 



Iodine Number Determina- 

 tion Flasks 248 



Ions, Apparatus for the De- 

 termination of the Migra- 

 tion of 399 



lonization Cell, Smith-Hale.. 399 



Iron Chimney 123 



Iron Crucibles 171, 174. 427 



Iron Dishes 298, 433 



Iron Evaporating Dishes.... 433 



Iron Gauze 623 



Iron Gold Washing Pans 298 



Iron Levels, Mechanics' 333 



Iron Machine Screws 436 



Iron Molds 132. 366 



Iron Mortars 367 



Iron Ore Grinders 175-177 



Iron Plumb Bob 412 



