Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.

3 Bei Besprechung der Resultate meiner vorliegenden Untersuchungen werde ich versuchen, diese W uchsformen physiologisch zu erkliiren. Mit wenig Worten will ich auch derjenigen Untersuchungen Erwiihnung thun, die sich auf die Wachsthumsgesetze beziehen, welche der Entwickelung gleichartiger, geschlossener Waldbestiinde zu Grunde Hegen. Auf dem Wege der Einzelforschung hatte ich etwa 130 Wald bestiinde in sorgfiiltigster Weise untersucht und unter Benutzung von Weiserbestiinden eine Reihe Erfahrungs- tafeln aufgesteIIt, die in hohem Grade geeignet waren, einen Einblick in das Gesetzmiissige der Entwickelung gleichartiger Waldbestande zu verschaft'en. Der Umstand, dass sich mir in dem noch fast viillig unbearbeiteten Gebiete der Krankheitslehre unserer Waldbaume ein so dankbares und durch die Schwierigkeiten, die sich dem Forscher entgegenstellen, nur Wenigen zu- gangliches Arbeitsfeld eroft'nete, veranlasste mich, die Fortsetzung dieser Er- tragsuntersuchungen Anderen zu iiberlassen. lch freue mich, dass diese Arbeit dann auch durch die forstlichen Versuchsanstalten aufgenommen ist. Wahrend ich meine Untersuchungen in allen Theilen selbst ausfiihren musste, was natiirlich dem Werth dieser Arbeiten zu Gute gekommen ist, benutzt der Verein der forstlichen Versuchsanstalten ein Heer von Ar- beitskraften und reichliche yom Staate gewahrte Geldmittel. Eine Reihe von Arbeiten ist seitdem erschienen, die ich hier nicht im Einzelnen ver- folgen kann, von denen ich aber nur die zuerst erschienene, namlich die von der Konigl. Wlirttem bergischen Versuchsanstalt veroft'entlichte Arbeit iiber den Ertrag der Fichte I) hervorheben will.

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2 Studium der Insecten zu. Das Leben der Forstinsecten, ihr Schaden oder Nutzen wurde bald das Lieblingsstudium vieler prak- tischer Forstwirthe und den gemeinsamen Bemuhungen zahlreicher Krafte gelang es, in einigen Decennien die Forstinsectenkunde zu einer geachteten wissenschaftlichen Disciplin zu erheben, die ein Gemeingut aller gebildeten Forstwirthe geworden ist. Anders stand es mit denjenigen Pflanzenkrankheiten, die sich nicht auf Thierbeschadigungen zuruckfuhren liessen. Ihre Erfor- schung blieb der jungsten Zeit vorbehalten, denn erst, nachdem die botanische Wissenschaft mit ihrer Hauptwaffe, mit dem Mikro- skop einen klareren Einblick gewonnen hatte in den normalen Bau und in die normalen Lebenserscheinungen der Pflanzen, nachdem insbesondere das Studium der Pilze in den letzten Jahrzehnten durch eine Reihe der hervorragendsten Forscher gefoerdert war, konnte die Untersuchung der krankhaften Erscheinungen des Pflan- zenlebens mit Aussicht auf Erfolg in Angriff genommen werden. Zwar waren in den Jahren 1833 bis 1841 drei Lehrbucher 2 der Pflanzenkrankheiten erschienen, namlich von Fr. Unger), von 3 4 Wiegmann ) und von Meyen), welche Zeugniss dafur ablegen, dass die Fortschritte in der Erkenntniss des Baues und Lebens der Pflanze bei den Versuchen, die krankhaften Erscheinungen des Pflanzenlebens zu erklaren, nicht unbenutzt geblieben waren, die irrige Anschauung uber das Wesen der Pilze, die voellige Unkennt- niss ihrer Entwicklungsgeschichte standen jedoch dem klaren Ver- standniss der Krankheitsprocesse hindernd im Wege. Insbesondere wurde die unbefangene Forschung durch den Umstand gestoert, dass man die wissenschaftlichen Errungenschaften, welche besonders durch J. v.

This is an EXACT reproduction of a book published before 1923. This IS NOT an OCR'd book with strange characters, introduced typographical errors, and jumbled words. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.

This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. ++++ The below data was compiled from various identification fields in the bibliographic record of this title. This data is provided as an additional tool in helping to ensure edition identification: ++++ Timbers And How To Know Them Robert Hartig, William Somerville David Douglas, 1890 Technology & Engineering; Agriculture; Forestry; Forests and forestry; Nature / Trees & Forests; Technology & Engineering / Agriculture / Forestry; Timber; Trees; Wood

This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. ++++ The below data was compiled from various identification fields in the bibliographic record of this title. This data is provided as an additional tool in helping to ensure edition identification: ++++ Die Zerstorungen Des Bauholzes Durch Pilze Robert Hartig Springer, 1885

This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.

This is an EXACT reproduction of a book published before 1923. This IS NOT an OCR'd book with strange characters, introduced typographical errors, and jumbled words. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.

This is an EXACT reproduction of a book published before 1923. This IS NOT an OCR'd book with strange characters, introduced typographical errors, and jumbled words. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.