Читать книгу A Brief History of Forestry - B. E. Fernow - Страница 29

The oldest forestry literature of this period is contained in the many forest ordinances, which allow us to judge from their prescriptions as to the conditions of the practice in the woods and as to the gradual accumulation of empiric knowledge. Of a forestry science one could hardly speak until an attempt had been made to organize the knowledge thus empirically acquired into a systematic presentation, and this was not done until the middle or last half of the 18th century.

The first attempts at a literary presentation of the empiric knowledge are found in the encyclopædic volumes of the so-called “Hausväter” (household fathers—domestic economists), who treated in a most diffuse manner of agriculture in all its aspects, including silviculture.

A number of these tomes appeared during the 17th century; the best and most influential being published at the very beginning of that century (1595–1609), written by a preacher from Silesia, Johann Colerus, and entitled Oeconomia ruralis et domestica, worin das ampt aller braven Hausväter und Hausmütter begriffen.

Colerus relied upon home experience and not, as Petrus de Crescentiis in his earlier work, Praedium rusticum (translated from the French, in 1592), had done, upon the scholastic expositions of the Italians. He was rewarded by the popularity of his work which went through thirteen editions and became very widely known.

Somewhat earlier, a jurist, Noë Meurer, wrote a book on forest law and hunting (second edition, 1576), which on this field remained long an authority, and gives insight into the condition of forest use at the time.

But the first independent work on forestry, divorced from the hunt and farming, did not appear until 1713, Sylvicultura œconomica, written by the Saxon director of mines, Hans Carl v. Carlowitz.

This book, while containing quaint and amusing ideas, gives many correct rules for silvicultural methods, especially as regards planting and sowing, but the subject of forest management or organization is entirely neglected.

At about the same time (1710) a forest official, v. Göchhausen, published Notabilia venatoris, which, however, contained little more than a description of the species of trees and methods of their utilization.

About the middle of the 18th century great activity began in the literary field. This was carried on by two distinct classes of writers, namely, the empiricists and the cameralists. The former—the holzgerechte Jäger—were the “practical” men of the woods who proved in many directions most unpractical, and exhibited in their writings, outside of the record of their limited experience, the crassest ignorance. The cameralists were educated in law and political economy and, while lacking practical contact with the woodswork, tried to sift and systematize the knowledge of the empiricists, and to secure for it a tangible basis.

Some five or six of the empiricists deserve notice as writers; the first and most noted of them was Doebel (Heinrich Wilhelm) whose book, Jägerpraktica (hunters’ practice), published in 1746, remained an authority until modern times for the part referring to the chase. The author was pre-eminently a hunter, who worked in various capacities in Saxony, a self-taught man with very little knowledge of natural history. Being familiar mainly with broadleaf forest he condemned planting and thinning, but described quite well for his time the methods of survey, subdivision, estimating and measuring, and the methods of selection forest and coppice with standards. His ignorance is characterized by his reference to the “sulphurous and nitric elements of the soil” as cause of spontaneous forest fires.

Opinionated and one-sided, like many so-called practical men, he came into polemic controversies with other practitioners, not less opinionated, among them J. G. Beckmann, who worked in another part of Saxony, where, having to deal with coniferous woods, he had gathered different experiences from those of Doebel. Although he was himself poorly educated, especially in natural sciences, he complained of the ignorance of the foresters, and in his book (Anweisung zu einer pfleglichen Forstwirthschaft, 1759), used for the first time the word Forstwissenschaft (forest science), and insisted upon the necessity of studying nature.

He may be credited with having really advanced forest organization by devising the first good volume division method, and silviculture by advocating the method of clearing followed by sowing.

The first practical forester with a university education was J. J. Büchting, who worked in the Harz mountains. His main interest lay in the direction of survey, division and orderly utilization. He did not, however, make any striking advance, except that he gave equal standing to both planting and sowing.

The two most eminent practitioners of the period, however, active during the middle of the century, were Johann Georg von Langen and his pupil, Hans Dietrich von Zanthier, both of noble family, and better educated than most of their contemporaries, and both engaged in the organization and management of Harz mountain forests, namely, those of the Duke of Brunswick and of the Count of Stolberg-Wernigerode.

The former, without occupying himself directly with literary work, laid down in his expert reports and in his working plans many instructions which form the basis for orderly management and silviculture far ahead of the times. Zanthier, writing considerably (especially Kurzer systematischer Grundriss der praktischen Forstwissenschaft, 1764), is also notable as the founder of the first forestry school (at Wernigerode), 1763.

Another of this class of better educated practitioners, and co-worker with the former two, was von Lassberg, who in 1764–1777 organized the Saxon forests.

An interesting incident in the life of the last three men is their journey to Denmark and Norway, whither they were called to organize the management of the forests connected with the mines.

Another prominent forest manager of the last half of the century, whose literary work is to be found only in various excellent official instructions, among which is one for the teaching of foresters, was the head of the Hessian forest service, a nobleman, v. Berlepsch.

Of the cameralists who helped to make forestry literature, six or seven deserve mention. These, men of education and polyhistors, were either at the head of affairs, or else professors at universities, where they included forestry as one of the branches of political economy.

The credit of the first really systematic presentation of forestry principles and rules, as developed at the time, belongs to Wilhelm Gottfried von Moser, a pupil of von Langen, who served in various principalities, and finally with the Prince of Taxis. In his Principles of Forest Economy, published in 1757, which for the first time brought out the economic importance of the subject, he discusses in two volumes divided into nine chapters the different branches of forestry.

A mining engineer, J. A. Cramer, came next with a very notable book, “Anleitung zum Forstwesen” (1766), which, although not as comprehensive as Moser’s, treats the subject of silviculture very well.

Equal in arrogance and opinionated self-satisfaction to any of the empiricists with whom he frequently crossed swords, was the Brunswick councillor, von Brocke, who, as an amateur, practising forestry on his own estate, developed the characteristic trait of the empiricists, namely, a profound belief in his own infallibility. He produced, besides many polemic writings, in which he charged the whole class of foresters with ignorance, laziness and dishonesty, a magnum opus in four volumes, entitled “True bases of the physical and experimental general science of forestry,” which is an olla podrida of small value.

Less original, but more fair and well informed, a typical representative of the cameralists, was J. F. Stahl, finally head of the forest administration of Württemberg, and at the same time lecturer on mathematics, natural history and forestry at the forest school of Solitude (Stuttgart). Although an amateur in the field of forestry, he was a good teacher and left many valuable and wise prescriptions evolved during his administration.

He compiled in four volumes a dictionary of forest, fish and game practice (Onomatologia forestalis-piscatoria-venatoria, 1772–1781) and founded the first forestry journal.

Since 1770, forestry courses had been given for the cameralists at most of the German universities, and many of the professors prepared textbooks for the purpose. At least three of these professors deserve mention, Beckman, Jung and Trunk.

The first, J. Beckman, professor of political economy at Göttingen, one of the most noted cameralists, was author of a work in forty-five volumes on the Principles of German Agriculture (1769), in which he devotes sixty-one pages to forestry, giving a complete system of forestry, with extracts from all known forestry writings.

J. H. Jung, who gave a special course on forestry at the Kameralschule of Lautern, published a textbook in 1781 in which forest botany was well treated.

J. J. Trunk, who was Oberforstmeister in Austria, as well as professor at Freiburg, was the most prominent of the three, and wrote a comprehensive work full of practical sense (Neues vollständiges Forstlehrbuch oder systematische Grundsätze des Forstrechtes, der Forstpolizei und Forstökonomie, nebst Anhang von ausländischen Holzarten, von Torf und Steinkohlen, 1789).

While at first the ephemeral writings, especially the polemic ones of the empiricists, found room in literary and cameralistic magazines, the need of a professional journal first found expression in 1763, in Stahl’s Allgemeines ökonomisches Forstmagazin, which ran into twelve volumes, and contains many articles important to the history of forestry, and is especially rich in its references to foreign literature.

Two continuations of the magazine under different editorships were of less value. But von Moser’s Forstarchiv, running from 1788 to 1807 with its thirty volumes, is an authority and a historical source of the first rank.

A very characteristic literature of the last half of the 18th century consisted in forest calendars in which advice as to monthly and seasonal procedures in the forest were given, Beckman and Zanthier being among the authors.