Teaching Students How to Conserve Energy. 403 



should treat of but one subject, and the proper heading should be 

 written plainly at the top. Through a careful classification of 

 the subject headings, an undue multiplication of cards is avoided. 

 Each card should bear the date of the lecture. A digest of refer- 

 ence readings is condensed on cards and filed in the same manner. 

 Author, title and page should always be given, and the card 

 classified by subject. Specially important information may be 

 placed on red or blue cards to make it more conspicuous. The 

 preparation of these cards gives the student valuable training, and 

 helps to fix the information in his mind, and it also points out 

 subjects in which he lacks information. With such a system, 

 cramming for examination is not needed. 



The cards may be filed in a vertical filing cabinet, or they may 

 have holes punched in one end and be kept in a loose-leaf note 

 book cover. After the course is finished, the cards, or such of 

 them as it is desirable to keep, are placed in the permanent file 

 under their proper headings. For foresters, the following 

 adaptation of the decimal system of classification is suggested : 



Classification of Forestry. 



00-09 General Forestry 

 00 — General Works 



000 — Miscellanies 



001 — Trade Catalogues (under suitable heads, e g. nursery) 



002 — Documents and Reports (not elsewhere provided for — file 

 by counties and years) 

 01 — Essays, Papers, Addresses 

 02 — Societies, Associations, Conventions 

 03 — Biography 

 04 — Forestry Education 



041 — Forest Schools 



042 — Arbor Day 



043 — Nature Study 

 05 — General Description of Countries 

 06 — Popular Forestry 



07 — Illustrative Material (Photographs, etc.) 

 J0-19 Forest Engineering 

 ID — General 

 II — Plane Surveying 



1 1. 1 — Instruments, Theory of Surveying 



1 1. 3 — Land Survey 



II. 3 — Boundary Survey 



1 1.4 — Topographic Survey 



1 1. 5 — Forest Reconnaisance 

 12 — Mapping 



13 — Designs, Specifications, Contracts 

 14 — Construction 



14.1 — Roads and Trails 



14.2 — Fire Lines 



14.3 — Bridges 



26 



