Forest resources of Montana

Hutchinson, S. B.; Kemp, Paul D.

doi:10.5962/bhl.title.66834

Cited by 3 publications

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“…He had considered " congenital lung adenoma " along with other possibilities but ruled it out. His grounds for doing so are not wholly convincing : certainly there are several points of similarity between this case and those described or quoted by Hutchison (1952) as examples of pulmonary adenomatosis. A further case is described by Willis (1953) wherein a few well-defined nodules were found in the lungs of a woman aged 58, who died from extensive pelvic growth of a spindle-cell sarcoma, regarded as recurrent growth, following the removal a few years earlier of " fibroids " which had not been examined microscopically.…”

Section: Discussionmentioning

confidence: 73%

Embolism to the Lungs by Trophoblast

Attwood

Park

1961

BJOG

236

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Gestational chorionepithelioma is the most tantalising of all neoplasms. Its life history is known with a degree of accuracy rarely obtainable in other neoplasms, for it can start only after fertil¬ isation of the ovum: it shows at times a spontaneous regression that betrays its intrinsic curability in other patients could we but reproduce in them the appropriate humoral climate: and it has a unique association with hydatidiform mole. Just because it has so many peculiarities of behaviour of this kind it ought, one feels, to be so much the more susceptible to investigation, and with greater hope of success, than other more orthodox neoplasms. One of its striking peculiarities is its ability to kill by metastasis yet show no source of origin within the uterus. Chorionepitheliomas of this type were early recognised, and the demonstration in 1893 by Dr. (later Professor) Georg Schmorl of Leipzig that particles of apparent trophoblast could be found with great frequency in the lungs of pregnant women at once raised the question: did chorionepitheliomas of this type arise by malignant transformation of placental emboli like these, or were the malignant foci in the lungs of these patients true metastases from a primary

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Section: Discussionmentioning

confidence: 73%

Embolism to the Lungs by Trophoblast

Attwood

Park

1961

BJOG

236

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“…3 Largely from dead timber salvaged in the spruce salvage project (to salvage beetlekilled spruce) that was started in 1952 and continued for several years. 4 Rough wood basis. 5 Less than 0.5 M standard cords.…”

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confidence: 99%

The forest resource of western Montana /

Pissot¹,

Hanson²,

Forest³

et al. 1963

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In 1925 the sawtimber volume in Western Montana was estimated to be about 37.5 billion board feet (2). 1 Forest Survey compilations in 1949 (4) based on field surveys prior to World War II raised the estimates to 39.7 billion. The most recent estimates, given in this report, show a present sawtimber volume of 73.5 billion board feet. Startling though this difference is, it will not surprise anyone who has followed the history of timber utilization and inventory practices in this country. Inventories have been geared largely to obtaining estimates of currently merchantable timber, rather than the total stand. Also, timber cruisers through the years have traditionally been cautious souls. They have found it more acceptable practice to underestimate rather than risk an overestimate. These two factorsrapidly changing utilization and conservative estimateshave generally resulted in rapid obsolescence of inventory estimates. The trend toward more intensive utilization during the period between old and new surveys is exemplified in Western Montana. Since World War II, the stumpage value of all species has risen. As a result, 1.5 million acres are today included as commercial that previously had been classified as noncommercial. This increase has been accompanied by a reduction of 1 million acres in nonstocked and seedling and sapling area and an increase of about 2.6 million acres of sawtimber. A substantial area within the 1910 burn has reached pole size, and about an equal area of the 1942 poletimber has become sawtimber. Changes in the economic importance of species and closer utilization with respect to tree size have both contributed to higher current estimates. Prior to World War II, timber utilization rested heavily on white pine and ponderosa pine. Other species were far less valuable. As a consequence, even the early estimates of white pine volume were very realistic and those of ponderosa pine were not much in error. In contrast, the inventory of other species was at best very rough. Today there are 61 billion board feet of Douglas-fir, western larch, Engelmann spruce, lodgepole pine, and the minor species. This amounts to more than twice the volume of these species reported earlier. Improved inventory techniques have been another major development. Estimates from earlier surveys were based largely on the compilation of public and private cruises, which varied greatly in objectives and standards. Although Forest Survey made check cruises to adjust estimates to a common standard, the total result could not be statistically evaluated for reliability. Estimates presented in this report are based on greatly improved sampling procedures that reduce the risk of bias. Timber inventory procedures are constantly being improved. Although it is now possible with the sampling system used in Western Montana to estimate volumes within prescribed rates of accuracy, the need today is for additional information that describes management needs and opportunities. Currently this Experiment Station is giving much attention to the ...

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The Authors’ Preface

Borisov¹,

Zverev²

2016

Nonlinear Dynamics

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Forest resources of Montana

Cited by 3 publications

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Embolism to the Lungs by Trophoblast

Embolism to the Lungs by Trophoblast

The forest resource of western Montana /

The Authors’ Preface

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