Tables of natural sines and natural tangents, for the use of field parties of the Second Geological Survey of Pennsylvania, 1875. [Page 4:] Table of natural tangents for each 30'', from 0o to 10o, prepared...by Otis H. Kendall, instructor in mathematics, University of Pennsylvania.
Gives the results of the combination of 200 "species" of minerals with citric acid alone and with the addition of NaNo3 and KI.; Those interested in the details of the methods used in the experiments are referred to the Annals of the New York Academy of Sciences, vol. I, pp. 1 and 153.
