A Treatise on the Application of Marine Surveying & Hydrometry to the Practice of Civil Engineering

accuracy accurately adjusted adopted already angles appear applied ascertained assumed base line bearing borings bottom cause channel chapter Chester circle constructed convenient cord correct course cross datum depth described determined direction distance divided easily employed engineering error example explained extended extremities fall feet field book fixed flag Flint flood gauge give given Glasson Heaton height high water inches laid land length low water magnetic manner marine mark means measured method miles minutes nature navigation nearly necessary noticed objects observations obtained occasion occur operation parallel Plate points pole positions possible practice protracting Quay reading reduced reference registered remarks represent rise river sand banks scale selecting shew shewn situations soundings spring stream sufficient suppose surface survey surveyor taken taking theodolite tidal lines tide tion triangulation stations variation Vernier whole