374 ^dal'tcal and CJiemkal "Lcctia-es. — Vatcnts. 



ycai's grow th, after ten years standing in the weather, were 

 examined, and found in the following state and condition : 



Cedar, perfectly sound. 



Larch, the heart sound, but sap quite decaved. 



Spruce fir, sound. 



Silver Hr, in decay. 



Scotch fir, much decaved. 



Pinaster, quite rotten. 



Chesnut, perfectly sound. 



Abele, sound. 



Beech, sound. 



Walnut, in decav. 



Sycamore, much decaved. 



Birch, quite rotten. 



Young's Annals of Agriculture, vol. vi. '250. 

 A piece of a branch cut off, and put in as a gate-post 

 twenty-five vcars ago, is vet perfectly sound, even at the 

 surface of the ground, a time that, I believe, would have 

 rotted the best oak. Another property which recommends 

 chesnut is, that it stains well, with a decoction of logwood 

 and Brazil-wood, with alum water, varying the proportions 

 at will. I have imitated mahogany so as to deceive most 

 people. 



MEDICAL AND CHEMICAL LECTURES. 



On Thursday, February 6th, a Course of Lectures on 

 Physic and Chcmistrv will reconnnence at the Laboratory, 

 Whitcomb-street, Leicester-square, at the usual morning 

 hours, by George Pearson, JSLD. F.R.S. Sec. 



LIST OF PATENTS FOR NEW IXVEXTIOXS. 



. To Joseph Fletcher, of Horsley, in the county of Derbv, 

 needle-maker ; for a machine for raising water. Dated Ja- 

 nuary 23, ISOf). 



To George Barton Alcock, of the city of Kilkenny, in. 

 that past of the united kingdom of Great Britain and Ire- 

 land called Ireland; for certain improvements in lamp?. 

 Dated Januar\' 2'2. 



To John Dobbs Davics, of New Compton-street, in the 

 county of jVIiddlcscx, gentleman ; for a saddle bar on an 

 improved construction, which he denominates the motion 

 saddle bar. Dated .January 22. 



To Robert Berriman, of Speen, in the county of Berks, 

 wheelwright; for a machine for preparing land for the 

 reception of seed, which he is confident will prove of the 

 utmost advantage to agriculturists in sowing corn, in pro- 

 ducing a resiular and more abundant crop, and in enabling 

 the farmer, at an easier rate, to keep his land Irce from all 

 kind-; of weeds. Dated .lanuary 22. 



m];teok- 



