FLUIDITY AND THE CHEMICAL COMPOSITION 109

TABLE XXII.—MOLECTTLAE VISCOSITY WORK (ajAf/p) IN ERGS X 10~3 AT
A SLOPE OF 0.000,032,3

Substance

Observed

Difference

Calculated

Difference,
per cent

Pentane....................... 329

Hexane....................... 415

Heptane...................... 495

Octane........................ 574

Isopentane.................... 320

Isohexane..................... 404

Isoheptane.................... 482

Isoprene...................... 284

Diallyl........................ 356

Methyl iodide.................. 255

Ethyl iodide................... 341

Propyl iodide----.............. 425

Isopropyl iodide................ 417

Isobutyl iodide................. 505

Allyl iodide.................... 399

Ethyl bromide................. 282

Propyl bromide................ 353

Isopropyl bromide.............. 346

Isobutyl bromide............... 433

Allyl bromide.................. 327

"Ethylene bromide.............. 450

Propylene bromide............. 526

Isobutylene bromide............ 614

Acetylene bromide.............. 418

Propyl chloride................ 294

Isopropyl chloride.............. 290

Isobutyl chloride............... 364

Allyl chloride.................. • 268

Methylene chloride............ 241

Ethylene chloride.............. 32G

Methyl sulBde................. 240

Ethyl sulfide................... 393

Methyl ethyl ketone............ 302

Methyl propyl ketone........... 383

Diethyl ketone................. 376

Formic acid................... 160

Acetic acid.................... 237

Propionic acid................. 323

Butyric acid................... 397

Isobutyric acid................. 398

Acetic anhydride............... 394

Propionic anhydride............ 542

Ethyl ether.................... 295

Benzene....................... 314

Toluene....................... 395

Ethyl benzene................. 475

Ortho-xylene................... 483

Meta-xylene................... 474

Para-xylene.................... 467

86.0
80.0
79.0

84.0
78.0

72.0

86.0
84.0

88.0

71.0
87.0

76.0
88.0

74.0

85.0
76.5

81.0

77.0
86.0
74.0

74.0

81.0
80.0

332

412
492
572

324

404
484

278
358

264
344

424

416
496

397

277
357
349
427
330

456
536
608

409
295

287
367

268

244
324

236
396

301

381
381

159
239
310
399

391

393
553

295

315
395
475
475
475
475

-0.9
0.7
0.6
0.3
-1.2
0.0
-0.4
2.1
-0.5
-3.5
-0.9
0.2
0.2
1.8
0.5
1.8
— 1.1
1.4
-0.9
—1.3
-1.9
1.0
2.0
-0.3
1.0
-0.8
0.0
-1.2
0.6
1.7
-0.8
0.3
0.5
-1.3
0.6
-0.8
1.2
-0.5
1.8
0.3
-2.0
0.0
-0.3
0.0
0.0
1.7
-0.2
-1.7