44 FORESTRY IN SPAIN 



The programme of studies iu Xiiometry comprise : 1. 

 A discussion of the general forms* affected by the different 

 parts of a tree ; the geometric and deudometric volumes 

 of these. 2. Description of dendometric instruments, and 

 the management and comparison of these 8. The deter- 

 mination of the cubic contents of trees considered isolated 

 or individually. 4. f he apparent, and the real volume of 

 wood; xilorneters: description, comparison, and use oi 

 them. 5. The determination of the normal co-efficient. 



6. Methods of determining the value in respect of the 

 weight and density of the timber. 7. Increase of wood in 

 growth, and determination of future and of maximum 

 increase. 8. The branding or marking of timber. 



In the cabinet of xilometry are various compasses for 

 the determination of diameters in the trunks of trees; 

 tape measures, and other metrical cinctures; rules for 

 marking of timber tit for cutting ; ordinary circumference 

 meters; circumference meters of Bouvart ; dendrometer 

 by right angled triangles ; dendrometers by arc of a circle; 

 dendronieters by the square or the perpendicular. 



In connection with the study of the ordenacion of 

 forests for successive thinnings and fellings, or the partition 

 and arrangement of sections, attention is given to I. 

 Definitions of terms in use in Dasonomia, or forest science, 

 a term derived from Daso forest, and Nomos law. The 

 object of dasocracia and divisions of the subject. 2. The 

 legal and natural condition of the forest. 3. Forestal 

 condition ; dasometry, forest measurement; and dasography, 

 or preparation forest maps. 4. Forestal condition, deter- 

 mination and survey of partitions designed for fellings, 

 and epidometry, or measuration of the trees. 5. Selection 

 of kinds of trees to be felled, and of treatment to be 

 adopted ; that of coppice-wood or timber forest, and 

 duration of cycle of operations. 6. Methods of exploitation ; 

 exposition of that devised by J. L. Hartig and by E. Cotta. 



7. Rational or scientific methods. 8. General plan, of 

 exploitation. 9. Special plan of operations in the first 



