Surveying and Levelling Instruments, Theoretically and Practically Described. / For construction, qualities, selection, preservation, adjustments, and uses; with other apparatus and appliances used by civil engineers and surveyors in the field.

by William Ford Stanley

Fig. 115.—Specimens of levelling books, 1/3 scale.

Ordinary Level Book with columns for No., Back Sight, Intermediate, Rise, Fall, Reduced Level, Distance, Remarks.

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Collimation Level Book, with columns for Back Sight, Intermediate, Fore Sight, Height of Collimation, Reduced Level, Distance, Remarks.

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Railway Engineers' Level Book, ruled for Back, Intermediate, Fore Sight, Rise, Fall, Distance, Reduced Level, Formation Levels, Cutting, Embankment, Remarks.

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