. Agricultural news. Agriculture -- West Indies; Plant diseases -- West Indies. Vol. XIII. No. 326. THE AGRICULTURAL NEWS. :m STUDENTS' CORNER. DYNAMICS OF A PLOUGH. Takt I\'. In preceding nuinl) extracts from the article utulei' review* have been given in In number an abstract of the concluding paragraphs is presented. Two yoked abreast, two equal parallel forces give a resultant equal to a single force acting midway V)etween them of etiual magnitude to their sum; in other words, tjie two horses abreast have the same as one big horse twice their power,
. Agricultural news. Agriculture -- West Indies; Plant diseases -- West Indies. Vol. XIII. No. 326. THE AGRICULTURAL NEWS. :m STUDENTS' CORNER. DYNAMICS OF A PLOUGH. Takt I\'. In preceding nuinl) extracts from the article utulei' review* have been given in In number an abstract of the concluding paragraphs is presented. Two yoked abreast, two equal parallel forces give a resultant equal to a single force acting midway V)etween them of etiual magnitude to their sum; in other words, tjie two horses abreast have the same as one big horse twice their power, yoked midway. (See fig. 12.) To draw tlie plough straight forward, the force must take a straight line from a pf)int midway between the hame- hooks of the single large horse. The liricle-pin must be on this imaginary straight IJTie. If instead of two iiorses abrea-st, four horses are yoked, two in front of two, a new vortical resultant has to be formed seen in fig. l.' Ki.;. 12. This resultant gives a combination half-way between the front and back The bridle-pin must be lowered about 2 inches from the proper position for two In the case of three horses aliroast the resultant is shifted to the middle of the niiddle horse at his hame-hooks. The bridle- pin must be shifted 6 inches or 7 inches on the bridle. As to the horizontal position of the bridle-pin, four horses, two in front of two, have the same effect as two abreast, and six , three in front of three, the same effect as three horses abreast. NOT EX0U(iH DIP. See to the .share: if it is worn liovel- led on the underside and is of steel, get it sharpened by a blacksmith: but if it is of cast iron, grind it bevelled on the upper surface or put on a new one. Cast .shares arc made by all makers with different amounts of dip, and can be got by ordering when required with more or less dip. If the .share is in good order and dip is still wanted, raise the bridle and shift the coult
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