viil CONTEN T S. 



SUPPLEMENT TO VOL. XXII. 



Engravings of the following Objects: 1. The Chinese Method of propagating 

 Frtlit Trtes \ 2. Mr. Broad's Instrument for measuring standing Timber: 3; 

 Mr. le Caan's improved Tram Plates for Rail Roads : 4. Guyton-Morveau's 

 permanent Apparatus for destroying Contagion. 



I. An Account of the Chinese Method of propagating Fruit Trees by Abscis- 

 sion. By Dr. James Ilowison .... 32t 



Jl. Description of a Gauge or Measure for standing Timber, invented by Mr. 

 James Broad, of Downing Street - _ . 324r 



III. Report of a Committee appointed by the Bath and West of England So- 

 ciety, to investigate the Claim of the Right Hon. Lord Somerville to a Pre- 

 mium " for the greatest Number and most profitable Sort of Sheep." 321 



IV. On the Advantages of the Use of Oxen and Neat Cattle in Husbandry. 

 By Lord Somerville - - - - 330 



ictical Statement on the foregoing Subject, with Claim of Premium. By 

 John Billingsley, Esq. - - - 334 



VI. On the Conversion of French Weights into English. In a Letter from Mr. 

 JohnFarey - - - - 337 



YII. Acrount of an Improvement in Tram-plates for Carriages on Rail Roads, 

 By Mr. Charles le Caan, of Llanelly in \\ ales - - 339 



VIII. Observations on the Use of Acid Fumigations in purifying the Air and 

 stopping the Progress of Contagion, and the most simple Means of com- 

 pletely obtaining this Effect. Extracted from the Correspondence of Mr. 

 Guyton-Morveau - 344 



IX. Account of a Well for preserving and filtering Rain-water for domestic 

 Purposes, where a Supply of Spring-water was not easily to be obtained* 

 Communicated by J. R. Gowen, Esq. - 353 



X. An Inquiry into the Structure of Seeds, and especially into the true Nature 

 of that rart called by G«rtner the Vitellus. By James Edward Smith, M. D. 

 F.R.S. P.L.S. - - * - - 354 



XI. Observations on Nauclea Gambir, the Plant producing the Drug called 

 Gutta Gambeer, with Characters of two other Species. By William Hunter, 

 Esq. Secretary to the Asiatic Society. Communicated by the President 36*6' 



XII. On the Varu-gation of Plants. In a Letter to Richard Anthony Salisbury, 

 Esq, F. R. S. and L. S. by Thomas Andrew Knight, Esq, F. R. S. and L. S, 



370 



XIII. Method of Painting Linen Cloth with Oil Colours, so as to be more pli- 

 ant, durable, and longer impervious to Water, than in the usual Mode. By 

 Mr. William Anderson, of his Majesty's Dock-yard, Portsmouth 373 



XIV. Account of the Royal Botanical Garden in the Island of St. Vincent. By 

 Dr. Alexander Anderson - 380 



XV. Query on Accidents frequently happening to Dies with which Medals are 

 struck. In a Letter from a Correspondent. - - 383 



Scientific News. - - - i - 38* 



