F. H. Richardson's bluebook of projection (1935)

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*A CARBONS 335 22. What causes spindling? 23. If your carbons are not overloaded but spindle, what is the first thing that demands your attention? 24. Name the effect of positive carbon spindling. Of negative carbon sprindling. 25. Does spindling tend to injure the metal parts of high intensity lamps ? Inspection of Carbons, page 34 2 26. What requires special attention in newly purchased carbons ? 27. What is important in regard to carbon cores? 28. Are small cracks running lengthwise in low intensity carbons harmful ? 29. What about circumferential cracks? Using Carbon Stubs, page 342 30. Is the use of carbon stubs questionable economy? Mushroom Carbon Tips, page 343 31. What is a mushroom tip and what causes it? Aj Carbon Deterioration, page 343 32. Do properly stored carbons suffer any harm because of age? 33. What are the proper SKA combinations and what is the amperage range of each. 34. In what various diameters are SRA positives made? What is the capacity of each? 35. What if these carbons are overloaded? 36. If these carbons are forced above capacity is screen illumination increased? 37. How is candle power resulting from various amperages calculated ? J/^yiaZ 38. What candle power can SRA carbons produce? __ 39. What size carbons must be used for different types of equipment of all amperages.