supplement. SCIENCE AND ART OF AGRICULTURE. 



1327 



sho 



8209. A portable hand corn mill with French burr stones, capable of being worked by one man, is 

 lown in Jig. 1169. The cost of this machine is 10/., but there are various others adapted for being 

 worked by two men, or by horse or engine power, at various prices, Irom 

 10/. to 307. When made entirely of iron, they are comparatively of little 

 use. The manufacturer of these machines is chiefly Dean of Birmingham. 

 (Johnson's Agr. Imp. for 1843, p. 29.) 



8210. Brick and tile making machines have recently been invented by va- 

 rious persons. One by the Marquis of Tweeddale is in most general use, 

 and he has recently invented a hand drain-tile making machine, which was 

 honoured with a premium in 1843. Messrs. Ransome have also brought for- 

 ward a new machine for making tiles and bricks, which received a silver 

 medal at the meeting of the English Agricultural Society at Derby in 184-3. 



8211 2797. A barley hummelling machine, of a simple, but very efficient 



construction, is described in Trans. H. S., vol.x. p. 334. " The machine con- 

 sists of a deal box (Jig. 1170.) in the form of a truncated square pyramid. 30 

 inches on the side at the base, 20 inches at the smaller end. and 48 inches in 

 length. In the interior of the box, the two lower angles are filled up with 

 wood, so as to form the half of an interior conical surface ; while the two 

 upper angles are left void, except that their surface is thickly studded with 

 iron spikes, driven into the wood of the box. An iron axle, or shaft, a, b. 

 as seen in the longitudinal section (Jig. \\70.), passes through it. in the line of 

 the axis of the conical surface, and is supported on bearings at each end, 

 formed in the bars crossing the ends of the box. The shaft is armed with two rows of blunt iron 

 Srl.Terineach row.lll lying in one plane ; the beaters onthe^e side* th.** being placed 



ii 70 i When the hummeller is in the work- 



ing position, the opening d, in the 

 smaller end, is brought under the corn 

 spout of the threshing-mill fanners, 

 supported on the foot e, to bring the 

 axis to the horizontal line. The ver- 

 tical lines bounding the space/, repre- 

 sent a transverse section in outline, 

 of the fanners, the prolongation b. c, 

 of the shaft passing through it, and 

 attached to the principal shaft by a 

 coupling box at b. The journal at c, is 

 supported on a bearing formed either 

 on the fauners or a separate framework. 

 The pulley g, giving motion to the beaters, is driven by a strap from the fan-shaft, or from such 

 other motion af may be found convenient, giving the beaters a velocity of about 400 revolutions per 



""'"The grain received from the spout of the fanners is violently agitated in its progress among the revolv- 

 lide 01 the case having a considerable inclination, the grain is advanced during 



C ^ n rlumm P e r H^ 



and to have given decided satisfaction." (Trans. H. S., vol. x. p. 336.) . 



8212.-2802. Application of steam to purposes of husbandry, showing the saving ,n hor,e corn that 

 might be made by employing locomotive engines instead of horses. (Quart. Jou). .-fg> ., vol. v. p. 84. 

 and p. 479. ; vol. vi. p. 411.; and vol. vii. p. 225.) 



Chap. III. — Edifices used in Agriculture, (p. 442.) 



8213.-2811. Edifices in use in agriculture. In the Encyclo r <rdia of C "''"^XZ Q "hLntJ In* a 

 lecture, we have gone into this subject in greater detail than could with propnetj have been done 



