How to Work With the Spectroscope
Browning, John Excerpt from How to Work With the Spectroscope: A Manual of Practical Manipulation With Spectroscopes of All Kinds, Including Direct-Vision, Rain-Band, Chemical, Solar, Star, Automatic, Micro, Screen, Bessemer, and Accessory ApparatusFor many years I have had almost daily to reply to inquiries respecting the best method of manipulating with various kinds of Spectroscopes.It had been suggested to me long since, by our highest authority on the s...