Unpublished paper, 'Disquisitiones novae pro determinatione longitudinis navis ope motuum lunae et unius observationis' [New investigations for the determination of the length of a ship by means of the motions of the moon and of one observation] by unknown author The author describes a method of determining the length of a ship using the motion of the moon and a single observer. A pencil inscription top right reads 'no date'. Some small deletions in the text. 13 manuscript pages including geometric figures in the text. Subject: Engineering / Metrology [late 18th century]