A New Measuring Instrument. 143 



be made in a country where lofoot saplings of weed species are 

 not abundant, a hole might be bored in one end of the stick to 

 receive a piece of chalk, thus providing a method of marking off 

 a lofoot distance on the tree to be measured. If many measure- 

 ments are to be made it would be profitable to use a bamboo rod, 

 jointed in 10, 15, and 20 foot lengths. 



The scale for the Biltmore stick is printed on the side opposite 

 the Christen arms, using the top of the stick as a zero point. In 

 order to get the scale marks at the proper angle to be in line with 

 the eye, the rule was fastened to a drafting board and the cross- 

 head of a T-square placed against one side. A pin was placed 

 in the shaft of the T-square, 25 inches from the far side of the 

 stick, in other words in the position of the eye. The T-square 

 was then shifted to points half way between the zero point and 

 the point being marked. A thread running from a pin in the 

 zero point, around the pin on the T-square, and thence to the 

 scale point being marked, indicated the course which the scale 

 mark should follow across the stick. 



The Doyle rule scale for 16- foot logs and the inches of di- 

 ameter occupy the remaining Space on the stick. The 16-foot 

 length was chosen because it is the easiest to reduce to all other 

 lengths. It is to be noted that the Doyle rule is used on this 

 stick because it is the accepted rule of the region. Any other rule 

 which would fulfill local requirements could be used in its place. 



The scales were marked with India ink and the whole was then 

 given two coats of shellac to render it water-proof and to protect 

 the scales from defacement. 



The appended tables show the scales that were used. 



