THE GENUS DENDROCTONUS. 37 
The owner was' again notified in December, 1907, of the serious char- 
acter of the outbreak, and the suggestion made that if the logs from 
the infested trees were converted into lumber and the slabs burned 
before the next May, it would result in the protection of the remain- 
ing living timber. Immediate steps w T ere then taken to carry out 
the original recommendations. Mr. Edmonston gave instructions to 
the manager of the estate in locating and marking the infested trees 
and in the essential features in the methods of utilization to destroy 
a sufficient number of beetles to check the infestation, and he 
also marked infested timber on the adjoining estate and National 
Forest. In May, 1908, Mr. Edmonston reported that the larger 
clumps of infested trees on the estate had been converted into lumber 
and the slabs burned, and that those on the adjoining estate and 
National Forest had been cut and barked. In November, 1908, Mr. 
Edmonston was instructed to make another inspection of the forest 
on the estate and surrounding area, and on December 1 he reported 
as follows : 
Nothing could be more satisfactory than the results obtained by the cutting of the 
infested timber on the estate. Your recommendations and instructions submitted 
to the owner, and carefully followed by the manager of the estate, have clearly demon- 
strated that insect infestation can be controlled and at no expense to the owner of the 
timber involved; in fact, & very satisfactory price was realized, resulting in a net 
profit, I understand, of |5 per thousand feet, board measure, on the 240,000 feet cut. 
This, of course, does not include the profit of the milling operations, but for the logs 
sold at the mill, after deducting the expenses of cutting and logging. The sawmill 
was owned and operated by an Idaho Springs firm, and the manufactured article sold 
in that town. I spent six days on the estate — November 18 to 23. After a very 
thorough examination of the timber, I found only three infested trees, isolated 
individuals, over a mile from where the large clumps of infested trees were cut. 
With the exception of those three trees there is no new infestation on the estate. I 
also examined the adjoining lands, but no new infestation was observed . The infested 
trees which I marked in December, 1907, had all been cut and barked. On the 
Pike National Forest, contiguous to the first-mentioned estate, where, you will 
remember, I marked some clumps of infested trees, no new infestation was found — 
not one tree. I found that all the infested trees I marked had been cut and barked. 
Ranger Kelso had charge of this work, and it has been quite thoroughly done. 
This most gratifying result demonstrated two important facts: 
One, that a very extensive outbreak by one of the Dendroctonus 
beetles can be controlled without expense, and even at a profit, 
whenever the conditions are favorable for the utilization of the 
infested timber; the other, that the essential details, recommenda- 
tions, and expert advice can be sucessfully carried out by a manager 
of a private forest and by the rangers of National and State forests. 
It also indicates quite conclusively that the widespread depredations 
in the Black Hills National Forest could have been prevented with very 
little expense to the Government if the matter had received prompt 
attention in 1901, when the first investigations were made and recom- 
