Bibliography 793 



"Chemistry," 1879-81, by George F. Barker; 1882-86, by 

 H. Carrington Bolton; 1887-88, by F. W. Clarke. [A 

 bibliography of chemistry for the year 1887, by H. 

 Carrington Bolton, was published in the "Miscellaneous 

 Collections."] 



"Geography," 1881-84, by F. M. Green; 1885, by J. K. 

 Goodrich; 1886, by William Libbey, Jr. 



" Geology " (including Petrography, Vulcanology, and Seis- 

 mology), i8/9-'8o, by George W. Hawes; i88i-'83, by 

 T. Sterry Hunt; 1886, by N. H. Darton; 1887-88, by 

 W J McGee. 



"Meteorology," i879~'84, by Cleveland Abbe. "Dynamic 

 Meteorology," by Cleveland Abbe, 1887-88; 1889, by 

 G. E. Curtis. 



"Mineralogy," 1879-80, by George W. Hawes; 1882-88, by 

 Edward S. Dana. 



"Paleontology" (North American), 1884-86, by J. B. Mar- 

 cou; 1887-88, by H. S. Williams. 



"Petrography" 1887-88, by George P. Merrill. 



["A Bibliography of Works on Building Stones," forms 

 Appendix E to George P. Merrill's paper on "The Col- 

 lection of Building and Ornamental Stones in the United 

 States National Museum; A Handbook and Catalogue," 

 published in 1886.] 



"Physics," 1879-86, by George F. Barker. 



" Vulcanology and Seismology," 1883 -'86, by C. G. 

 Rockwood. 



"Zoology," i8;9-'86, by Theodore Gill. 



CONSTANTS OF NATURE 



THE eminent English mathematician, Charles Babbage, pro- 

 posed, as early as 1856, a great work, entitled "The Con- 

 stants of Nature and Art," intended to contain all facts which 

 can be expressed in numbers, in the various branches of 

 knowledge, such as the atomic weight of bodies, specific 

 gravities, elasticity, tenacity, specific heat, conducting power, 



