spring IVheat. sj 



Exp. yi. Oxide of iron - - 200 grain?. 

 Carbon 1-1 0th - - -20 



Cornwall clav vitrified in \66° 

 ot" \\ cdgewood - 100 



A very black glass was obtained by tbe fusion of this 

 mixture, and a metallic button which weighed 54 grains : 

 equal to 27 per cent. Again fused, and yjelded 52 grains, 

 or 26 per cent, 



Exp.YIl. Oxidcofiron - - 200 grains. 

 Charcoal 1-lOth - 20 



Pure sand - - 100 



The result from this mixture was a prismatic coloured 

 glass partially crystallized in radii upon the surface. The 

 metallic button weighed 47 grains: equal tj £3-.|r per cent. 

 This experiment was twice repeated, and tl-e results were 

 tlie same as the former, and 43 1- grains or 21? percent. 

 From these experiments it appears most evident that the 

 effects of the carbonaceous matter at a certain stage of se- 

 paration are more extensive with clay and sand than with 

 lime; and still more so when fused with oxide alone than 

 in addition with any of these earths; though vitrified Corn- 

 wall clay nearly approaches the same standard. 



XIII. Proceedings of Learned and Economical Societies. 



SPRING WHEAT. 



J. HE Board of Agriculture having received information, 

 from various districts, of the benefit arising from the cul- 

 tivation of spring wheat ; and it appearing to the Board that, 

 at the present period, it may be particularly useful to pro- 

 mote that object, have resolved to ofli2r the following pre- 

 miums : 



To the person who shall, in the spring of 1S05, culti- 

 vate the greatest number of acres of spring wheat, not less 

 than twenty, fiftv guineas ; or a piece of plate of that value. 



Accounts, verified by certificates, to be produced on or 

 before the first Tuesday in February 1S06. It is required 

 that the soil, quality of seed, sorts of wheat, time of sow- 

 ing, produce, and value of the crop, and the effects of any 

 distemper which may attack the plants, be reported. 



For the next greatest quantity, thirty guineas ; or a piece 

 of plate of that value. 



For the next greatest quantity, twenty guineas ; or a 

 piece of plate of that value. 



Fd The 



