LIST OF CHIEF AUTHORITIES. vii 



R. Clausius. Mechanical Theory of Heat. London. 1879. 

 Encyclopaedia Britannica. Edinburgh. 1875. 

 J. D. Everett. Units and Physical Constants. London. 1879. 

 A. Geikie. Text-book of Geology. London.^ 1882. 



M. J. Jamin. Cours de Physique de 1'ficole Poly technique. 

 Paris. 1863. 



Fleeming Jenkin. Electricity and Magnetism. London. 1873. 



E. Hospital! er. Formulaire Pratique de 1'Electricien. Paris. 



1883. 



iandolt and Bernstein. (L. and B.) Physikalisch-Chemische 

 Tabellen. Berlin. 1883. 



M. M. Levy. Sur les Unites Electriques. Paris. 1882. 

 The Nautical Almanac. London. 1884. 

 S. Newcomb. Popular Astronomy. London. 1883. 

 W. J. M. Rankine. Rules and Tables. London. 1876. 

 Rees' Cyclopaedia. London. 1819. 



S. Thompson. Elementary Lessons in Electricity and Magnetism. 

 London. 1883. 



S. D. Various publications by H. J. Chaney and others, for the 

 Standards Department, (i.) Equivalents of Metric and Imperial 

 Weights and Measures ; (ii.) Calculations of Densities and Ex- 

 pansions ; (iii.) Annual Reports, chiefly the Appendix to II. ; 

 (iv.) Circular on the Standard Wire Gauge. 



H. Watts. A Dictionary of Chemistry. London. 1866. 



(1) Barlow. Rankine, p. 42. (2) Rankine, p. 61, Chambers 

 Mathematical Tables, 1881. (3) Rees, Art. Cipher. (4) Hoiiel, 

 Tables Numeriques, Paris, 1866. (6, 7, 8) Rankine, p. 90. 

 <9, 10, 11, 12) S. D. i. iii. ; Rankine, p. 92 ; Everett, p. xiv. 

 (13) Biedermann, p. 15. (14) Dr. Win. Smith's Dictionaries, 



