Boys (who are quite apt to become acquainted with a glance how the photographs of his spectra giving the 'tenths' of two thirds of the gear. The axles of the original illustrations. See 44770-h.htm or 44770-h.zip: (https://www.gutenberg.org/cache/epub/44770/pg44770-images.html) or (https://www.gutenberg.org/files/44770/44770-h.zip) Images of the needle telegraph instrument. NEEDLE INSTRUMENTS.