La Chronique des jardiniers et agricoles Gazette . t de la mettre en œuvre, et de la distanceentre eux élargir vers la fin de l'appareil. En effet, s'il est utilisé pour réduire une roughsurface, s'il doit y avoir aucune irrégularité dans la dis-tance des dents, ils devraient être plus près vers theback partie de la machine ; pour les mottes de terre sera partiellement rompu par les dents de devant, et il thusbe ont agi de façon plus efficace sur ceux par derrière. Il isevidently incorrect d'avoir les dents ou les plus proches de la terre est plus rudes, et plus éloignées où il isfinest. La meilleure forme de la herse est le rhom-boi

• Contributeur: The Reading Room / Alamy Banque D'Images
• ID de l’image: 2AJC56M
• Taille du fichier: 7,2 MB (350,5 KB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 2352 x 1063 px | 39,8 x 18 cm | 15,7 x 7,1 inches | 150dpi

Informations supplémentaires

Cette image appartient au domaine public, ce qui signifie que le droit d’auteur a expiré ou que le titulaire du droit d’auteur a renoncé à ses droits. Les frais facturés par Alamy couvrent l’accès à la copie haute résolution de l’image.

Cette image peut avoir des imperfections car il s’agit d’une image historique ou de reportage.

The Gardeners' Chronicle and Agricultural Gazette . t of the implement, and the distancebetween them widening towards the end of themachine. Indeed, if it be used to reduce a roughsurface, if there is to be any irregularity in the dis-tance of the teeth, they should be nearer towards theback part of the machine; for the clods of earth willbe partially broken by the front teeth, and will thusbe more efficiently acted on by those behind. It isevidently incorrect to have the teeth closest wherethe earth is roughest, and farthest apart where it isfinest. The best form of the harrow is the rhom-boidal, with the teeth equi-distant throughout. Itis this form alone, or some such modification of it, asappears in the zig-zag arrangement of the implementas it isnow constructed at many manufactories, whichinsures that all the teeth, when placed regularly anduniformly over its surface, shall work in differentpaths, and that thus the whole of the ground shall beuniformly stirred and broken. A consideration of theannexed figure will make this appear.. In addition to this we mustobserve, what is notalways conceded, that harrowing is purely a xurfaceoperation. It is by no means to he aimed at thatthe harrow should penetrate to the bottom of thefurrow-slice, and stir the land thoroughly to itsdepth—this is woik for the grubber, or scarifier, orcultivator, by which it will be done with greatereconomy of power. Indeed, whether such a processbe aimed at or not, the farmer may rest assured thatit will not be effected ; the form of the implement isobviously unsuited to such work. We have seenheavy drags, as they are termed, loaded with thetrunk of a tree lashed on to it, so that (whether re-quired or not) eight or nine oxen had to be yokedto it; their slow motion, and the depth to which theteeth of the implement penetrated, made its workresemble an imperfect grubbing or scarifying—notby any means a harrowing—of the land. The process of harrowing is most complete whenthe surface, aft

Recherche dans la banque de photos par tags

• bookcentury1800
• bookdecade1840
• bookidg
• booksubjecthorticulture