RKVIRWS, 119 



to it. On the general question, we have no hesitation in saying 

 that Brandis's instrument is the most useful all round, and 

 Christen's for trees not exceeding 100 feet in height. 



Chapters XI., XII., and XIII. deal with the Determination of 

 the Contents of Standing Trees, by the eye, Volume Tables, Farm 

 Factors, etc. Here we are still chiefly on European ground. 



Chapter XIV. treats of the Determination of the Contents of 

 Stands or Whole Woods. It is a combination of German 

 methods with American practice. There is the estimate by the 

 eye "en bloc," or by tree; by Stand Tables and by Valuation 

 Surveys (that is to say, the measurement of sample plots, which 

 may take the shape of a strip or other form). Then comes 

 the measurement of the trees ; the recording ; the methods by 

 felled sample trees, such as the mean sample-tree method, the 

 arbitrary Group method, Draudt's, Urich's and Hartig's methods, 

 the method of form factors, and others, as described in European 

 forest literature. 



Chapter XV. brings the Determination of the Age of Trees 

 and Stands in the well-known orthodox style. 



Chapter XVI. deals at considerable detail with the Growth 

 of Trees and Stands, that is to say, with the Diameter, Height, 

 and Volume Increment. 



Chapter XVII. is devoted to Yield-Tables, which is followed 

 by a final chapter on Graphic Methods used in Forest 

 Mensuration. 



The Appendix deals with Legislation regarding the Measure- 

 ment of Logs in the United States ; a list of the most important 

 works dealing with Forest Mensuration ; tables showing the 

 Contents of Logs ; volume tables for standing trees, and tables 

 for form factors ; tables of growth and yield of spruce, beech, 

 and Scots pine in Germany ; again, yield-tables of American 

 trees, such as white (or Weymouth) pine, Adirondack spruce, 

 loblolly pine, chestnut, red cedar, red oak, and pitch pine, and 

 miscellaneous tables. 



It will be observed that the book is very complete, but it is 

 also very big, and it contains a good many things which will 

 hardly be of use in the United States for some time to come. 

 Still, the book contains, in addition to the German methods of 

 forest mensuration, original ideas, and we have no doubt that 

 it will mark another step in advance in the development ot 

 scientific and systematic forestry in the United States. 



