172 transactions of royal scottish arboricultural society. 



Over-Ripe and Dying Trees. 

 The disadvantages of leaving over-ripe and half-decayed trees 

 standing in hedgerows and plantations are many. In the first 

 place they are an eyesore, and spoil the amenity of the place ; 

 they are constantly shedding their branches and so littering the 

 ground under them, which is a serious consideration if the ground 

 happens to be agricultural land. It is a waste of good timber, 

 and consequently a waste of money, to let a good tree stand until 

 it decays. It provides undesirable insect pests with a first-class 

 breeding-ground, helps the growth of fungus disease, and in 

 many ways spreads disease and infection over a wide area. 

 In time these trees break off or are blown over and cause far 

 more damage to hedges, fences, or young growing trees, than if 

 they had been felled at the proper time, and sold for their proper 

 value. Geo. Mowat. 



Particulars of Form-Factors worked out for 

 CoRSiCAN Pine and Larch. 



Figures for trees measured tip to 26 tk February 19 17. 



Corsican Pine Larch 



Age 35 years 35 years 



Number of poles per acre . 540 of all sorts (300 larch, 200 



Corsican pine and Scots 

 pine, 40 hardwoods) 



Trees measured . . . 150 120 



Smallest 5^-girth measured at 



4 ft. 3 ins. . . . .6 ins. 4 ins. 



Diameter at top of pole . . about 3 ins. about 2.V ins. 



Average height of trees . . 45 feet 44 feet 



Form-factor for all trees meas- 

 ured, carried to third decimal 

 figure -476 -483 



Extreme form-factors for indi- 

 vidual trees . . . -593 and -400 "585 and -425 



Figures for trees measured up to ist April 191 7. 

 Corsican Pine Larch 



Trees measured . . . 297 250 



Average height . . . 45^ ft. 44^ ft. (nearly) 



Form-factor for all trees . . -469 -474 



Extreme form-factors . . -593 and -400 -592 and -425 



