68 OUR NATIVE FERNS AND THEIR ALLIES. 



DAVENPORT (George E.). Catalogue of the "Davenport 

 Herbarium" of North American Ferns. Salem (1879). Sup- 

 plement (1883). 



Some Comparative Tables showing the Distribution of 



Ferns in the United States of North America. In Proceedings 

 American Philosophical Society, 1883, 605-612. 



MACOUN (John) and BURGESS (T. W. J.). Canadian Filici- 

 nese. In Transactions Royal Society of Canada (1884). 



REDFIELD (John H.). Geographical Distribution of the 

 Ferns of North America. In Torrey Bulletin, VI, 1-7 (1875). 



Minor notes on distribution will also be found in the follow- 

 ing journals : 



Botanical Gazette, I, u, 22, 27; II, 55, 62; III, 82; IV, 128, 

 139, 177, 232; v, 15, 39; vi, 195, 220, 248; VII, 76, 96, 160; x, 

 370; xn, 63, 67, 181 ; xil, 117. 



Torrey Bulletin, II, 24, 28; III, 2, 33; IV, 2, 17, 42; v, 38, 39; 

 vi, 8, 175, 177, 199, 206, 221, 234, 291, 345, 347 ; vn, 16, 80, 89, 94, 

 96, 118; vin, 47, 93, 105, 127. 144; ix, 55, 71, 128; x, 32,40; xi, 

 7, 67 ; xiv, 97, 149- 



Other notes still will be found in Mr. Davenport's series of 

 " Fern Notes" and Prof. Eaton's series of " New and Rare Ferns 

 of the United States," together with much of the remaining 

 descriptive literature noted in Chapter VIII. on the Ferns and 

 their allies. The literature on fossil ferns is very extensive. A 

 valuable work on the coal flora will be found in the Reports 

 P and PP of the Second Geological Survey of Pennsylvania. 



CHAPTER X. 

 METHODS OF STUDY. 



The great benefit which a scientific education bestows, whether as training 

 or as knowledge, is dependent upon the extent to which the student . . . 

 .learns the habit of appealing directly to Nature. HUXLEY. 



149. Determination of Species. The first thing to learn 

 about a plant or animal is not its name, but its structural 

 characteristics, knowing which the name can be readily deter- 



