VIN'AL] 



MECHANICAL AIDS IN NATURE-STUDY 



63 



(4). If surface becomes rough set in moderately warm place, 



as on the radiator. Pan must be level. 

 (5). Make writing or drawings with hectograph ink, and a 



heavy pen on hard paper. Make a broad line. 

 (6). Allow ink to dry. Do not use a blotter. 

 (7). Dip a sponge in cold water. Press nearly dry. Moisten 



surface of the pad. 

 (8). Place written sheet of paper, face downward on pad. 

 Smooth paper with hand so that all parts stick to the 

 pad. 

 (9). Leave paper on pad for about three minutes and then 

 gently remove. 

 (10). Moisten the pad again. 



(11). Place a sheet of hard paper on inked surface and smooth 

 , it as in original copy. 



(12). Remove the paper carefully and repeat the process as 



many times as desired. 

 (13). If the pad is covered with strips of paper to the edge of 

 the writing the paper used in copying can be more 

 easily removed. 

 (14). When through copying, wipe the surface with a sponge 

 dipped in slightly-warmed water. 

 The uses of the hectograph pad are too well known to dwell 

 upon. Test slips, blanks for calendar observations, outline draw- 

 ings of birds, shells, etc., are useful for identification sheets, for 

 coloring, etc. 



7. Material. 



(1). Shoe boxes labeled on the end, arranged alphabetically, 

 and stacked as in shoe stores, make a systematic arrangement for 

 storing dry material such as: seeds, varieties of corn, leaf stems 

 of the horse-chestnut, bayberries, etc. This material lasts year 

 after year and is one of the best nature libraries. Anything that 

 does not pay rent by being useful at least once a year should be 

 delegated to the waste basket. 



(2). Mounted birds, preserved specimens, etc., are numbered 

 and a corresponding number is placed on the shelf so that whenever 

 they are taken for class work or as loan material they may be 

 returned to their particular niche. 



8. Pictures. 



Picture study does not take the place of field work. The 



