FORESTRY. 755 



name of the tree should l)c Sequoia vjashingtoniaoia, instead of S. 

 gi(j(int((i. 



The Big Trees of California, W. R. Dudley {Forester, 6 {1900), 

 Wo. 9, pp. 206-2 10, fig. i).— The author gives a concise statement of the 

 facts observed in an investigation of the Big-Tree regions of California, 

 in which he visited various groves, took the measurements of the trees, 

 studied their habitat as closely as possible, and incidentalh' secured 

 information relative to their ownership. It is said there are 33 distinct 

 groves of Sequoia gigantea, 8 of them north and 25 south of Kings 

 River, California. 



The result of lumbering these trees is mentioned, and the milling 

 capacity of the various mills situated in the vicinit}^ of the different 

 groves is shown. The agitation that is going on for the acquirement 

 of these groves by the Government, and their future protection, has 

 both a sentimental and an economic value. South of the Kings River 

 these trees are said to be an important factor in stream protection, and 

 as such their preservation becomes an important forestry question. 



Tree planting in Oklahoma, W. L. Hall {Forester, 6 {1900), No. 6, 

 pp. 130. 131). — The forest conditions of Oklahoma are briefly described, 

 together with the soils and distribution of streams. Under proper 

 management it is said that many thousand acres of land at present 

 almost worthless could be made to produce valuable timl)er at slight 

 expense. In this region planting white elm, green ash, mulberry, 

 catalpa, locust, Russian mulberry, hackberr}', black walnut, and black 

 cherry may be usually relied upon to be successful. Plantings of these 

 trees should be on the lower slopes and in the valle3'S, l)ut if upland 

 planting is attempted it is stated that it should be carried on in a 

 limited way with such trees as black locust, Russian mulberry, white 

 elm. and haekberry. 



When increase in thickness begins in trees, G. T. Hastings 

 {Science, n. ser., 12 {1900), No. 303, pp. 5S5, 580). — A brief summary is 

 given of observations made upon the beginning of increase in thick- 

 ness in a number of trees. It was found that in the broad-leaved 

 species examined no increase of thickness occurred until the buds had 

 opened and the first leaves expanded. The first formation of new 

 wood was in the neighborhood of the terminal bud, and was not con- 

 tinuous around the stem. The growth progresses gradually from the 

 1-3'ear-old twigs to those 2 and 3 years old, and when the new wood 

 begins to be formed on the 5 or 6 year old twigs, the process becomes 

 ver}' rapid, occurring over the entire tree. Growth usually begins 

 and extends more rapidly on the upper and more exposed limbs, some- 

 times a week before any .sign of growth being observed on the lower 

 ones. 



In the pines the increase in thickness began on the 2 and 3 year old 

 twigs before it was noticed in 1-year-old twigs, or before the buds had 



