Sopwith's Surveying Diagrams. Surveying and Levelling [printed diagrams 1 to 5] / Thomas Sopwith. [nd. 5 sheets, printed and published for the Department of Science & Art by Vincent Brooks, King St., Covent Garden. Comprise 'Vernier Scales', 'Vernier on dial plate and scales of length', 'Scales of height', 'Surveying dial', 'Division of straight lines'] Sopwith's Surveying Diagrams. Surveying and Levelling [printed diagrams 1 to 5] / Thomas Sopwith nd.