Diagram illustrating the method used in designating unnamed streams. Explana- 

 tion of diagram : — 



Main stream. : — Name only is used, i.e., Wood river. 

 Principal tributaries : — 



(a) If they have a name that only is used, i.e., Trout brook, Rock creek. 



(b) If they do not have a name they receive two or more letters and a 

 number as follows :- — 



1st letter is the initial of the first named stream below (downstream) 

 on the same side, i.e., T. (for Trout brook). 



2nd letter is the initial of the main stream, i.e., W. (for Wood river). 

 Number — indicates that it is the first, second etc., tributary above the 

 named stream. 

 Thus T.W.I. (Trout, Wood 1.) is the first tributary above Trout brook 

 on that side; R.W.I. (Rock, Wood 1.) is the first tributary above Rock 

 creek on the opposite side of the river. 

 /Secondary & tertiary tributaries: — All receive numbers, the tributary nearest the 

 mouth is numbered 1. Thus T.W.3. in the above diagram has 5 secondary tri- 

 butaries and of these 1, 2, 4, each has one tertiary tributary. 

 Lake tributaries : — Named streams are not numbered. Unnamed streams are 

 numbered clockwise around the lake, starting from the right of the outlet, see 

 Mud lake in above diagram. 



