INDEX TO VOLUMES I-X. 
163 
Page. 
Peiree, C. S., communication on—Cont’d. 
the coincidence of the geographical dis¬ 
tribution of rain fall and illiteracy, as 
shown by the statistical maps of the 
ninth census reports. Abstract .i 68 
logical algebra. Reference .i 88 
quaternions, as developed from the gen¬ 
eral theory of the logic of relatives. 
Title only .i 94 
various hypotheses in reference to 
space. Title only .i 97 
Peirce’s criterion.vi 155 
Pendulum formulae.vii 89, 101 
Perception of color, form, and light.vil 72 
Periodic integrals.x 100 
law of the chemical elements..vii 15 
Permian formation of North America...iii 67,104 
Persian calendar.ii 38 
Perturbatibns of moon’s motion, Computa¬ 
tion of.-vi 136 
Polyhymnia by Jupiter.viii 54 
Peru, Meteorology of.ii 35 
Peters, Prof. C. H. F., cited on supposed 
trans-Neptunian planet.iii 20 
letter on transit of Venus, 1874. Commu¬ 
nicated by A. Hall. Abstract .ii 31 
Petrographic methods.vii 36 
Phenomena, Physical basis of..vii 40 
Philosophical Society of Washington.viii xlv 
Growth of.X 47 
why this name wa*; chosen.i v, x 45 
Phonetic alphabet.....,.ix 17 
Phosphorescent clocks..iii 33 
Phosphorus and cerebral activity. v 75 
Photo-engraving.i 41 
Photographic panorama.v 21 
Photographing the sun’s corona.iii 117 
transit of Venus, 1882.vi 21 
Photographs of transit of Venus, 1874.ii 31 
Photography as an aid to astronomy.i 28 
an aid to research.i 41 
Composite.1.vii 25 
Photometry, Stellar.i 63 
Photophone.iv 143 
Phthisis.ii 124 
Physical geography. (See Geography and 
Geology.) 
Physical-geographical divisions of the south¬ 
eastern portion of the United States, 
ix 22 
physical investigations by Joseph Henry..ii 271 
method in intellectual sciences.vii 18 
Physics, List of papers on (see also Acous¬ 
tics, Optics, Electricity): 
on the nature and origin of force. W. B. 
Taylor. Abstract and reference .i 27 
Page. 
Physics, List of papers on—Cont’d. 
on the fatigue of metals. Major King. 
Title only . i 53 
on waves, molecules, and atoms. W. B. 
Taylor. Abstract .i 66 
on the rectilinear motion of a particle 
toward an attracting’ centre. A. Hall. 
Reference . i 88 
on the motion of a particle towards an at¬ 
tracting centre. H. H. Bates. Title 
only .i 89 
on the nature of the force of gravitation. 
R. Keith. Title only .i 89 
on a method of developing magneti-m in 
bars of steel. J. Henry. Title only, 
i 97 
on the movement of a particle attracted 
towards a point. H. H. Bates. Ab¬ 
stract .ii 19 
a method of determining a definite inter¬ 
val of time, and its application to meas¬ 
uring the number of vibrations of solid 
bodies. A. M. Mayer. Title only .ii 64 
Crookes’ radiometers. J. Henry. .46- 
stract .ii 80 
force and momentum. E. B. Elliott. Title 
only ......ii 84 
a thermodynamic theory of the spectrum. 
S. Newcomb. Title only .iii 41, 43 
vortex motion in ordinary fluids. T. 
Craig. Reference .iii 143 
curious fallacy as to the theory of gravita¬ 
tion. B. Alvord. In full .v 85 
on physics and occult qualities. W. B. 
Taylor. Presidential address. In full, 
V125,126 
the three methods of evolution. J. W. 
Powell. Presidential address. In full, 
vi xxvii, 110 
the nature of matter. H. H. Bates. Ref¬ 
erence .vi 5 
substance, matter, motion, and force. M. 
H. Doolittle. Title only .vi 14 
the atomic philosophy, physical and meta¬ 
physical. J. C. Welling. Presidential 
address. In full .vii xxix, 81 
music and the chemical elements. M. H. 
Doolittle. Abstract .vii 26, 27 
review of the theoretical discussion in 
Prof. P. G. Tait’s “ Encyclopsedia Brit- 
annica” article on mechanics. H. 
Farquhar. Abstract.. .vii 29 
the physical basis of phenomena. H. H. 
Bates. In full .vii 40 
a formula for the length of a seconds- 
pendulum. G. W. Hill. Reference..-vii 101 
