160 
Page. 
Necks Of VOICANOES .eecssccecsscscsversessressscrees vil 78 
Nerve CUPLENtS...crrccssecccrsresceoseeee 60 
Névé and glacier defined.......... 37 
Nevada, Glacial epoch in... om 84 
Physical features Of.......cecessseressseeves aeiscues | O4 
Volcanic activity in .....crccccscrcscecccscerseet 99 
New Hampshire, Relation of winds to sea 
temperature on the coast Of.,........+++ 4i 17 
New Mexican volcanoes and lava-fields...wii 76 
ING W BEAK sis sctcccoaseusssassceapensanssanshecpunesa weneaaet 14 
Newberry, Dr. J. S., cited on fossil plants 
frOM Vir Pinder. sssseesscscees kanes 4i (38), (42) 
Newcomb, Simon, communication on the 
transits of Venus, past and future. 
TIDE ‘ONUY caivaspeseceasacces shuncsncoxss hsteheisesesl 29 
the possibility of a universal atmos- 
phere. Title only.....0seccccresers eakteae week 52 
the progress of the construction of the 
new telescope for the Naval Observa- 
tory. Reference... eosssoreeh 62, 63 
the proceedings of the commission to 
arrange for the observation of the next 
transit of Venus. Title only.....ccceeek 65 
the mechanical representation of a 
problem in least squares. Reference. 89 
the transit of Venus. Title only....c.0.0.dk 41 
u thermodynamic theory of the spec- 
trum. Title only.......++ shidtencasccoven iii 41, 43 
the cosmogony. Title Only.......cecse-e-ee-d 113 
the recent transit of Mercury [1878]. 
ee eeeeeneeeneeseee 
ADBSErGCE.ce..c0-osscvscccsceserssosccessceereccesses ii 199 
observations of the total solar eclipse, 
July 29,1878. ADStract...ccerceeesceeeeens Ai 202 
the recurrence ofeclipses. Titleonly.did 33 
a recent visit to California to inspect a 
site for the new Lick observatory. 
Title on ly....-.000+s spirit PAT enter ssoose Add = 45 
the future of the human race regarded 
from the standpoint of evolution. 
Presidential address,1879. Title only..did 52 
the principles of taxation. Title only, 
iii 119 
the relation of scientific method to so- 
cial progress. Presidential address, 1880. 
Tr FUlll...ceeveveese seduvevsebuceeh casadeanwsanehenss iv 40 
the speed of propagation of the Charles- 
ton earthquake. Reference.......-.sses x 28 
TEMALES ON AULOLAS....cecceceeseesccsee serene cesens i 46 
the radiometer......... Pinrarrertreceerc by ih 
passage of light through a narrow slit, 
iii 120 
AULTOLAS.serscccereereeeeeseerees aanpRewERAes iv 22 
Benjamin Peirce... Riristagmestxasmesed iv 26 
Newton, Henry, Researches in the Black 
Hill Dy... .ccccceseeree reese eecuseaveburdnte hace did 125 
Newton, Prof. H. A., cited on the aurora..iv 22 
PHILOSOPHICAL SOCIETY OF WASHINGTON. 
Page. 
Newton, Sir Isaac, cited on action at a dis- 
TANGO sccrcnovcdsscvcences co sssacebennsssseanesMeenariiey ieee 
atoms......... ose sdsars ae SAL 
elasticity sosondsauncge Len 
laws of orbits........... docctssacces Reet 
the spectrum............ cuee suqnvaueent Hie 
the ultimate............. coonssusssser AOU An 
trisection of angles......... a eecesee setoasvuckesecae out 
Newton’s rings.......... eehaeceow ented asvsomeaanevanne mkt 
Newtonian formula of gravitation, Modifica- 
LOMO Tpatedesnsasrenseon sobscedepaaoscbane WMRTnICRm 
PHILOSOPHY iii ce cccevessoccccnsocseucavenssspiasreantnaaanamm 
Niagara Falls, Earth tremors at..........s00e04W 186 
Nichol, J. P., Thermometric experiments 
of... be cuseucsueccusbossouustneiuwenssashititeimmntm 
Wehilaon) W. ni randnt “of the committee 
to collect information relative to the 
meteor of December 24th, 1873. In full. 
Map And 2 figures ..ececccece -seseceeccereseeshl 139 
remarks on the effect of magnetism on 
the length of magnetic bars............. Ad 373 
Nomogram......... canthenanemmaetean cocstsedessnstes aurea ana 
Normal section in geodesy........eeseceesereee Wh 123 
North American Indians, Errors respecting, 
4 175 
North Carolina coast, Geology Of.............Wk 28 
Earth quakes.....ccrccorccecsscseres oussspseeanel LOL g Oe 
Mich MINES: s::.....0..cevcassccccnsssuswasenshere teeta 
thermal belts adauabtavtpbeehay ks 
WAterSPpOUts.......00seeccercoesseers woonetie sen asanee ii 104 
Northers and magnetic disturbance........wil 25 
Nth-power numbers whose sum is an nth- 
POWEY...resccceee eocsccevecscsee cossseens ccscscnsngecde 100) 
Numas, Genesis and demonology of... 
Mythology of.......+.. Eaapsieha Niet Tapas 
Nymphalidae, Pupation Of.......:scceeceeceeees 
Objective, Interior angle of...... 
Achromatic...... assseuyelneveaateni sunacehe soosenevas Ray (OG 
Objectives, Color corrections to achromatic, 
iii 39 
Oil-iMMETSION....cereereeeeeeee scesesauseennee ae 
Oblateness of the earth, Change f TNs cesta viii 19 
Oblique illumination in microscopy.........dil 25 
Observation and experimentation, Princi- 
PlOS Of.cs0ccsscconsscceasssecovenssuessenssee LUNs e anna 
Observation equations, Special treatment of 
COYEATN ceccnsseosnssss ccdaccessccacessse A LOGs MRM 
Observations of the meteor of Dec. 24,1873..4% 144 
Occult force.........00.-cc0008 see WA Xxxiii 
QUGNIGIOS coos cesoccnccsssasouss cessnnserguay pep ecnvostnnW  aeen 
Oceanography, List of papers on: 
on the effects of winds and barometric 
pressure on the tid@s of Boston, and 
on the mean level of the sea. W. Fer- 
rel. Abstract and reference. ..rrccrereed 5d 
tone eeeeenee 
Se 
eS 
