190 American Plough, &c. 
Chesnuts 1! francs per lb. &c. Combined with gelatine the 
prices are 20 per cert higher. 
12,—An American Plough was presented to the pa 
of Encouragement at Paris, by J. C. Barnet, Esq. 
S. Consul, and by the Society it was referred to a special 
committee, who engaged M. sate postmaster at Villeju- 
if, to make atrial of it. This was done on the 13th of 
June last, in presence of the aininitbe and a number of 
Sg she friends of M. Benoist. Two French ploughs 
at the same time, for the purpose of comparison. 
The satitiines admit that the American performed extreme- 
ly well, cutting the sward smoothly, and laying a neat aud 
well-turned furrow. But on trying it with the Dynamomeler, 
it was found to require a draught of 180 to 190 kilogrammes, 
while the plough in common use there, required only! 
to 140, and one of a newer kind, with an avant train moved 
with 110 to 120 kilogrammes. They attributed the greater 
draught of the American plough to the manner of conduct- 
ing it, and to the irregularities of its motion, which, they 
say, could not be avoided after a long trial. A neat figure 
of the American aoa is given in the Bulletin of the Soci- 
es for August, 18: 
13.—Improvement in Metallic Casting. —Iron and metal- 
lic castings are said to be very much improved, by subject- 
ing the metal, when in moulds, to pressure. This is done 
by making a part of the mould ‘of such a form as to receive 
a fag which, on the metal being introduced. is made to 
n it with any required force. It is stated that cast- 
ings Sbtsincd } in this way are not only free from the imper- 
fections generally incurred in the usual mode, but have a pe 
culiar soundness of surface and closeness of texture, quali- 
ties of the utmost importance in ordnance, rolling cylinders, 
- The improvement belongs to Mr. Hollingrake, who 
has obtained a patent for it. 
| ta. Canal Navigation—The tread-wheel has been ap- 
vote alg M. Van Heythuysen, to the propelling of barges f 
- The object is to obviate the use of horses. 
apparatus is made light and separable from the barge, ‘i 
itis found that two men can propel a ba arge by it, at the 
