1

Soil Acidity Preferences of Earthworms

Year:
1924
Language:
english
File:
PDF, 232 KB
english, 1924
3

An Accurate Wild Flower Guide

Year:
1951
File:
PDF, 114 KB
1951
5

A New Interpretation of the Dryopteris Clintoniana Group

Year:
1950
Language:
english
File:
PDF, 293 KB
english, 1950
7

Notes on copper mining in the American colonies

Year:
1908
Language:
english
File:
PDF, 300 KB
english, 1908
8

The colloid nature of the complex inorganic acids

Year:
1910
Language:
english
File:
PDF, 483 KB
english, 1910
9

The copper deposits of Franklin-Adams counties, Pennsylvania

Year:
1911
Language:
english
File:
PDF, 1015 KB
english, 1911
12

The crystallography of morphine and certain of its derivatives

Year:
1919
Language:
english
File:
PDF, 135 KB
english, 1919
14

Crystallography and optical properties of three aldopentoses

Year:
1919
Language:
english
File:
PDF, 47 KB
english, 1919
15

The plagioclase feldspars as a case of atomic isomorphism

Year:
1922
Language:
english
File:
PDF, 114 KB
english, 1922
16

The active acidity of soils

Year:
1924
Language:
english
File:
PDF, 75 KB
english, 1924
18

Radio-detector minerals

Year:
1925
Language:
english
File:
PDF, 48 KB
english, 1925
19

A tabulation of the aluminum silicate minerals

Year:
1926
Language:
english
File:
PDF, 66 KB
english, 1926
20

Composition of the ash of spanish moss

Year:
1927
Language:
english
File:
PDF, 48 KB
english, 1927
21

Microsteris, Phlox, and an Intermediate

Year:
1943
Language:
english
File:
PDF, 309 KB
english, 1943
23

The Active Acidity of Soils

Year:
1924
Language:
english
File:
PDF, 235 KB
english, 1924
24

Save Our Wild Flowers

Year:
1931
Language:
english
File:
PDF, 642 KB
english, 1931
25

Exploring for Plants in the Southeastern States

Year:
1934
Language:
english
File:
PDF, 1.30 MB
english, 1934
26

Thirty-three Eastern Wild Flowers

Year:
1939
Language:
english
File:
PDF, 256 KB
english, 1939
27

Food from the Wild

Year:
1939
Language:
english
File:
PDF, 224 KB
english, 1939
28

THE SOIL REACTIONS OF SPIRANTHES CERNUA AND ITS RELATIVES

Year:
1921
Language:
english
File:
PDF, 286 KB
english, 1921
29

SOIL TESTS OF ERICACEAE AND OTHER REACTION-SENSITIVE FAMILIES IN NORTHERN VERMONT AND NEW HAMPSHIRE

Year:
1920
Language:
english
File:
PDF, 1.21 MB
english, 1920
32

The Triassic of Pennsylvania

Year:
1912
Language:
english
File:
PDF, 84 KB
english, 1912
33

Silicified Wood from the Triassic of Pennsylvania

Year:
1912
Language:
english
File:
PDF, 893 KB
english, 1912
36

North Border Relations of the Triassic in Pennsylvania

Year:
1913
Language:
english
File:
PDF, 613 KB
english, 1913
40

Ecological Studies in the Stockholm Cays

Year:
1921
Language:
english
File:
PDF, 717 KB
english, 1921
41

Literature

Year:
1922
Language:
english
File:
PDF, 226 KB
english, 1922
42

Soil Acidity and a Field Method for Its Measurement

Year:
1920
Language:
english
File:
PDF, 1.68 MB
english, 1920
43

Plant Distribution Around Salt Marshes in Relation to Soil Acidity

Year:
1920
Language:
english
File:
PDF, 726 KB
english, 1920
44

Asplenium gravesii in Pennsylvania

Year:
1920
Language:
english
File:
PDF, 275 KB
english, 1920
45

The Soil Reactions of Certain Rock Ferns: II

Year:
1920
Language:
english
File:
PDF, 704 KB
english, 1920
46

Observations on the Habitat of Certain Ferns

Year:
1917
Language:
english
File:
PDF, 322 KB
english, 1917
47

Recent Fern Literature

Year:
1920
Language:
english
File:
PDF, 269 KB
english, 1920
48

The Soil Reactions of the Ferns of Woods and Swamps

Year:
1921
Language:
english
File:
PDF, 989 KB
english, 1921
49

The Soil Reactions of Certain Rock Ferns: I

Year:
1920
Language:
english
File:
PDF, 677 KB
english, 1920
50

Recent Fern Finds in West Virginia

Year:
1939
Language:
english
File:
PDF, 577 KB
english, 1939