Xiv 
PAGE 
New York Island, mineralogy. .22, 
48-50 
North America, alternations 
of temperature’... --. - 96 
exhaustion of soil...... 16-17 
glacial epochwns< 209. . 102 
glacial erosion in....... 51-52 
singing beaches of ..... 72-76 
skill of prehistoric races of 15 
North Carolina, minerals. . .12-13, 
37-38, 50, 53 
Norwegian glaciers, amount of 
erosion by ..: 2222... « 52 
Oak-leaves of Alaska, large.. 95 
Obsidian arrow-heads in Ore- 
PON ss Sorkin eee 82 
involeanic ash’. eee 64 
Oberstein, Germany, lapidary 
Work ‘at: {SPR eee 62 
Office of parenchyma of leaf.39-40, 
44-4 
Officers election of .). 0.5204 70-71 
Ontonagon, Mich., glacial 
pPlenomrena at sul sce? 14 
nip rte sos toe. eee 62 
Oregon, Indian arrow-heads of 
obsidian: 25 yee eee 63, 82 
snow-peaks of.......... 77 
Ores; Lake-Superior ..*< Sue: Lf2 
silver, processes for amal- 
gamatiOn... +. VATE 1,72 
New Jersey, Triassic ...18-19 
Origin of leaf-forms........ 38-44 
of Puget Soundeyss2 . 4 104 
of sounds in nature...... 75 
WEthoclase S424 wesc eee 49 
Ozone; literatureof. -. . 122i. 34 
Paleolithic arrow-heads....81—82 
stone implements ....1, 7-12, 
81-82 
Palisade Range, N. J., miner- 
Palm, fossil, at Florissant.... 
near Green River .¥ <2 22. I 
Parenchyma of leaf, office of. 
39-40, 44-46 
Patio and Cazo processes for 
amalgamation of silver 
EES iis Pio Te RL Ae Bl 1; (2 
Patrons of the Academy, list. 113 
PAGE 
Perotsistte ye: 12. 0), 5a Ly 
Peroxide of hydrogen, litera- 
(beset a eae 34 
Peru, silver castings from... 15, 
62-63 
Petrified forest in Colorado.. 6-7 
Phlogopite cece eeeis oa x6 6 49 
Phosphorescence of fluorite.77, 100 
Phosphoric acid, exhaustion 
I SOUL hee SERA ss 16 
Photomicrography, processes 
and results metre 2). 105 
of wood-sections ........ 107 
Pickling of ancient silver cast- 
INES, We cats scjotee eae. 15 
Piercing of granyte by use of 
corundumit))72/3. tie ‘105 
Pittsburg, Penn., acidity of 
atmospheres. ..en soe 65-66 
Pittsford, Vt., marble....101—102 
Placoderms of the Devonian. 54 
Planting of trees: (2.5 eee 
Plants, annual growth-rings in 88 
fossil, in Colorado..... L377) 
of northern Tertiary, 
PLesent rans) see 96 
Plattsburg, N. Y., ‘‘ singing 
beach’? at :.'4. eee 73 
Porcupine mountains, Mich., 
geological structure... 14 
Prehistoric races of America, 
Shilliotee ee. =: oe Bee 15 
Processes for amalgamation of 
SHVEnOresntp mince sae i 2 
Process of cutting intaglios 
and cameos >. -ea5enr 105 
Pseudomorphs after garnet .. I 
Publication Committee, Re- 
POfts crac ccna 12, 70 
fund, list of contributors. 112 
Publications of Academy, list 
of. fecipientss-- ne: 138-149 
Puget Sound, origin of ...... 104 
Pulmonate molluscs, lingual 
dentitiontac eee o- 71 
PyTite:. ants Shae Pos ene 215,28 
PyfOXeme® sina secereye seal os 18 
Quartz) jaw ree. 12; 18; 23, 495.72 
Rapid City, Dak., arago- 
MICS Asma is waee Poteet 17 
