and oonta caused by such destroyers of our present capital 

 of timber may bo obtained by v/orking up Deputy Supervisor 

 Pratt 1 s figures on this sale. He estimator 1 the timber on 

 a cutting area of forty acres and applied a cull per cent, 

 this being 10$ for yellow pine find 20$ for Douglas fir, rhlto 

 fir and inoonse oodar. How at tho stumpage rates in the 

 contract ($2.50 for yellov; pine, .*1.50 for Douglas fir, and 

 $1.00 for vJhlte fir and inoonse cedar) , the loss would amount 

 to $252. tO for the entire forty acres or 06.30 an aore. The 

 figures are, of course, based on estimate but they aro at 

 least suggestive. 



The reduction of our future capital of timber, on 

 tho othor hand, is not eo tangible or self-evident to the 

 casual observer, but it is a factor that is none the less 

 to be reckoned with and one about r- hioh we, as yot, know 

 far too little. This reduction of the future capital of 

 timber ib caused by a reduction of annual growth in a tree 

 or stand. Such a reduction is, vdthout a doubt, brought 

 about by a certain forest fungi and the mistletoes which, 

 while they do not actually destroy the wood in a tree, sap its 

 vitality to such an extent that it cannot make the growth of 

 which it is capable under healthy conditions. Among the 

 fungi causing euch conditions on this Forest may be mentioned 

 Gyranosporangium blaialeanum producing the witches brooms on 

 incense cedar, Peridermium sp. forming the pronounced swell- 

 ings on the branches of various species of pine, and the 

 fungus which is partially defoliating as many of the lodgepole 

 pines in the neighborhood of Lake Tahoe. Tho mistletoes, 

 while they are not fungi, certainly sap the vitality of any 

 ttee en which they occur. The true mistletoes, (Phoraden- 

 dron sp.) are found commonly on oak and oometimes on incense 

 cedar on this Torest. The false mistletoes (Rhazoumofskya 

 sp.) are common on western yellow pine, lodgepole pine, and 

 other conifers, and are of course well known to every one. 

 Even the manzanita is not exempt from mistletoe attack since 

 Phoradendron flavesoens, the cQnnon mistletoe on the oak, 

 was found gowing on a manzanlta on the road between Nevada 

 City and North Sloomfield. 



A study carried on by Dr. "oinecke noar Iai:o Tthoe 

 in the winter of 1910 showed that loss on lodgepolo plrjes 

 infected with a needle disease actually amounted to 63 : /> of 

 the noodles. Sinoe the foliage of a tree is tho "factory" 



