Importance and nature of classification described, 300.--Classifications and tariffs distinguished, as a means of changing rates, 301.--The three classification committees, 304.--Wide differences between them illustrated, 305.--Historical development, 306.--Increase in items enumerated, 309.--Growing distinction between carload and less-than-carload rates, 310.--Great volume of elaborate rules and descriptions, 312.--Theoretical basis of classification, 314.--Cost of service _v._ value of service, 315.--Practically, classification based upon rule of thumb, 319.--The "spread" in classification between commodities, 319.--Similarly as between places, 320.--Commodity rates described, 322.--Natural in undeveloped conditions, 323.--Various sorts of commodity rates, 324.--The problem of carload ratings, 325.--Carloads theoretically considered, 326.--Effect upon commercial competition, 327.--New England milk rates, 329.--Mixed carloads, 331.--Minimum carload rates, 322.--Importance of car capacity, 334.--Market capacity and minimum carloads, 336. Uniform classification for the United States, 337.--Revival of interest since 1906, 339.--Overlapping and conflicting jurisdictions, 340.--Confusion and discrimination, 341.--Anomalies and conflicts illustrated, 342.--Two main obstacles to uniform classification, 345.--Reflection of local trade conditions, 345.--Compromise not satisfactory, 346.--Classifications and distance tariffs interlock, 347.--General conclusions, 351. OFFICIAL (Trunk Line) A Subject to Uniform Bill of Lading Conditions. L.C.L. C.L. 1 Academy or Artists' Board, in cases (C. L. min, weight, 36,000 lbs.) 2 5 2 Acetone, in iron drums 3 5 3 ACIDS: * * * * * 4 Acetic, liquid: In carboys, boxed (C. L., min. weight 24,000 lbs.) (subject to Rule 27 and Note 2) 1 5 In bbls. or iron drums (C. L., min. weight 36,000 lbs.)-- 3 5 In tank cars (see Note 1) -- 5 5 Boracic, in bags, boxes, bbls. or casks (C. L., min. weight 36,000 lbs.) 3 5 * * * * *