90 



of 6" and these are marked off on the tree, 

 starting from 6" above the soil (see fig. 31 II). 



3. Then, at 6" above the ground, with a tin template 

 cut to an angle of 45, another line is made 19" in 

 length (see fig. 31 III). 



4. Through the extreme point of this oblique line, a 

 vertical line is made, parallel to the first, up and 

 down the tree, with the straight edge (see fig. 31 IV). 



5. With the tin template, parallel side lines are also 

 drawn from the other measured points to meet the 

 second vertical line at 12" distances (see fig. 31 V). 



With the tapping system followed on another estate, 

 the side lines are not set out with templates, but at 

 equal distances on the second vertical line (see fig. 32). 

 First one vertical line is set out (see fig. 32 I), then at 

 one quarter of the way round the bark, a second one 

 (see fig. 32, II). Then, on the first line, starting from 

 the soil, points are marked off at distances of 16" (see 

 fig. 32. III). On the second line, similar points are 

 marked off, the first one at 6" above the level of the 

 corresponding point on the first line, and subsequently 

 at intervals of 16" (see fig. 32. IV). These points are 

 joined (see fig. 32". V). The incised lines do not make 

 exactly the same angle with the vertical canal, but the 

 difference is so small that it may be neglected. 



The tapping of young trees was carried out in the following- 

 way. As soon as the trees, 22" above the ground, have a 

 girth of 1 6", the first cut is made, a V, covering half the 

 surface of the tree, each leg of the V having a length of about 

 7 l /% ff . The length of surface suitable for tapping is about 

 1 6", and this will be sufficient for daily tapping for about 

 a year. It must not be forgotten that several days will 



