""A Manual Of The Principal Instruments Used In American Engineering And Surveying"" is a comprehensive guidebook written by W. and L. E. Gurley. The book provides detailed information on the various tools and equipment used in engineering and surveying, including transits, levels, theodolites, compasses, chains, tapes, and more. The manual is designed to be a practical resource for engineers, surveyors, and students in these fields, providing clear...