924 JOURNAL OK FORKSTKV 



iftches the lo-inch mark on the calipers should appear at the cross. The 

 second reading should he at right angles thereto. Both readings should 

 he recorded. 



Height. — All trees having a diameter breast high of 4 inches or over 

 outside the bark should have their height recorded with an accurate 

 hypsometer ; the distance from the tree to the instrument should in all 

 cases be measured with a steel tape. In measuring leaning trees the 

 hypsometer should be set for a horizontal distance measured from a 

 ]KMnt directly under the top of the tree. 



Marking and Numbering the Trees 



The trees shall be marked by means of a distinct painted cross, the 

 intersection of which is at the measured breast height (4.5 feet above 

 ground). Crosses should be placed on the same side of every tree on 

 a sample plot. 



The trees shall be numbered with paint in a legible manner consecu- 

 tively, with Arabic numerals placed in the upper right-hand quadrant 

 of the cross. The use of a stencil is suggested. 



On rough-barked trees the use of a draw-knife to remove the outer 

 bark where it is to be painted is recommended. 



Individnal Tree Records 



A suitable held notebook should be used in keeping the records of 

 tlie measurements of the trees on the plots. Each sheet should be 

 marked with the name of the co-operator, the sample-plot number, the 

 location, the date, and the serial page number. In accordance with the 

 standard forms furnished, the following data are to be recorded : 



1. Consecutive tree number. 



2. v'^pecies. 



,^. D. b. h. (two measurements if calipered). 



4. Clear length in feet to base of crown in case of hardwoods. 



5. Total height of tree in feet. 



6. Volume in feet board measure or cubic feet.' (Use designated vohunc tables. 

 Conservation Commission will furnish these.) 



7. Damage to the tree or crown by insect, fires, etc., if expedient. 



8. Crown class, if practicable. 



Record species by common names preferably. 



If calipers are used, the diameter taken first, whether on the south, 

 north, east, or west side of the tree, should be just at the center of the 



■' Computed in the Office. 



