APA

Hall B., . (1830). Letter from Captain Basil Hall, R. N. to Captain Kater, communicating the details of experiments made by him and Mr. Henry Foster, with an invariable pendulum, in London; at the Galapagos Islands in the Pacific Ocean, near the Equator; at San Blas de California on the N. W. coast of Mexico; and at Rio de Janeiro in Brazil. : .

Chicago

Hall Basil, . 1830. Letter from Captain Basil Hall, R. N. to Captain Kater, communicating the details of experiments made by him and Mr. Henry Foster, with an invariable pendulum, in London; at the Galapagos Islands in the Pacific Ocean, near the Equator; at San Blas de California on the N. W. coast of Mexico; and at Rio de Janeiro in Brazil. : .

Harvard

Hall B., . (1830). Letter from Captain Basil Hall, R. N. to Captain Kater, communicating the details of experiments made by him and Mr. Henry Foster, with an invariable pendulum, in London; at the Galapagos Islands in the Pacific Ocean, near the Equator; at San Blas de California on the N. W. coast of Mexico; and at Rio de Janeiro in Brazil. : .

MLA

Hall Basil, . Letter from Captain Basil Hall, R. N. to Captain Kater, communicating the details of experiments made by him and Mr. Henry Foster, with an invariable pendulum, in London; at the Galapagos Islands in the Pacific Ocean, near the Equator; at San Blas de California on the N. W. coast of Mexico; and at Rio de Janeiro in Brazil. : . 1830.