6 DR. THOMAS STERRY HUNT ON THE 
essence from the plant, to subdue the powers of electricity and of steam to the service of 
man. To those who attain these ends the world gives its substantial rewards, but far 
higher honors are instinctively rendered to those who by their disinterested researches, 
undertaken without hope of recompense, have made known to us the great laws which 
serve to guide searchers in the fields of technical science; to those who have labored 
serenely, with the consciousness that whatever of truth is made known by their studies 
will be a lasting gain to humanity. “Thus,” to repeat words used on another occasion, * 
“it ever happens, in accordance with the Divine order, that the worker must lose himself 
and his lower aims in his work, and in so doing find his highest reward; for the profit of 
his labor shall be, in the language of one of old, ‘to the glory of the Creator and to the 
relief of man’s estate.’ ” 

APPENDIX.+ 
The views of the relations of the natural sciences which have here been insisted upon, 
and were previously embodied in the essay on “ The Domain of Physiology,” above referred 
to, may be concisely stated as follows :— 
“The study of material nature constitutes what the older scholars correctly and com- 
prehensively termed physics (the words physical and natural being synonymous) and 
presents itself in a two-fold aspect, first as descriptive, and second as philosophical,—a 
distinction embodied in the terms Natural History and Natural Philosophy, or more 
concisely, in the words Physiography and Physiology. The latter word has, from the 
time of Aristotle, been employed in this general sense to designate the philosophical study 
of nature and will so be used in the present classification. 
“The world of nature is divided into the inorganic or mineralogical, and the organic 
or biological kingdoms, the division of the latter into vegetable and animal being a sub- 
ordinate one. The natural history or physiography of the inorganic kingdom takes cogni- 
zance of the sensible characters of chemical species, and gives us descriptive and systematic 
mineralogy, which have hitherto been restricted to native species, but in their wider sense 
include all artificial species as well. The study of native mineral species, their aggrega- 
tions, and their arrangement as constituents of our planet, is the object of geognosy and 
of geography. The physiography of other worlds gives rise to descriptiye astronomy. 
“The natural philosophy of the inorganic kingdom, or mineral physiology, is con- 
cerned, in the first place, with what is generally called dynamics or physics, including 
the phenomena of ordinary motion, sound, temperature, radiant energy, electricity and 

*The Relations of Chemistry to Pharmacy and Therapeutics: an Address before the Massachusetts College 
of Pharmacy, by T. Sterry Hunt; Boston, 1875. 
+The subjoined scheme of a classification of the natural sciences was read by the present writer before the 
American Association for the Advancement of Science at Minneapolis, in August, 1883. In view of its importance 
for a better understanding of the views set forth above, I have not hesitated to reproduce it as an appendix to the 
present paper. [T. Srerry Huxr.] 
