232 Note-Taking and the Use of Maj)S^ Etc. — Foerste. 
nine equal pieces and paste them in according to some self- 
arranged plan. When the map is on the scale of one mile in 
32 mm. the map could be divided into pieces 3 minutes long 
and 2 minutes broad, again leaving an irregular strip to be 
stowed away in some fashion. For persons to whom such 
irregular cuttings are inconvenient the original sections could 
be made 12 minutes long and broad, which would cut up 
into equal pieces for both scales of the map. Where exposures 
are not densely crowded and the problems under investiga- 
tion are not exceedingly intricate, maps on the smaller scale 
have been found sufficiently large and more convenient since 
more of the map is brought on each leaf. Where intricate 
problems are being studied a map of the larger size is often of 
convenience, and any failures on the part of this to serve the 
purposes of the field-work can be remedied by pasting in, 
Avhere required, some map on a still larger scale Avhich then 
may be referred to its appropriate square on the larger map, 
but is itself designated by some of the smaller letters of the 
Greek alphabet, and all the notes are referred for the time 
being to this smaller map instead of the one ordinarily in use ; 
and the fact that such a subsidiary map is being used can be 
then indicated on the general map of the same note book by 
inserting the Greek letter designating the same in the place 
covered by the subsidiary map. It may often be considered 
desirable to construct such subsidiary maps at once in the 
field, when they may be labelled in the same way as though 
pasted in from some printed source. 
A section or small sketch map practically explaining only 
the condition of affairs at any one locality may be entered 
vmder the appropriate figure designating that locality without 
further reference. 
The advantage of this system becomes very great when taken 
in connection with the collecting of specimens in the field, 
since the mere designation of the locality b}' means of two 
letters and a single number is sufficient for any locality where 
only one kind of rock is found. Where several kinds of rock 
occur at the same locality a small printed letter of the English 
type is hastily inserted in brackets in that part of the note 
describing the place and the particular kind of rock collected. 
Each new letter added in the note signifies a new kind of rock 
or at least a specimen gathered at the same locality but at 
