Horticultural Society. — Astronomical Society. 301 



William Buck, F.H.S., lor the Production and Dissemination 

 of the very superior Variety of Rhubarb, called " Buck's Rhu- 

 barb." 



The following communications were read : 



Directions for the Management of the Hot-house Fire- 

 places that are constructed with double Doors and ash-pit Re- 

 gisters. By William Atkinson, Esq. F.H.S. 



Description of an Apparatus for ventilating Hot-houses. 

 By ?>Ir. George Mugliston of Repton, near Derby. 



On a Construction Strawberry Beds. By Thomas Bond, 

 Esq. 



Description of a self-acting Ventilator for Hot- houses. By 

 John Williams, Esq., a Corresponding Member of the So- 

 ciety. 



April 20. — The following communications were read : 



Description of a new-invented Lime-duster, with Observa- 

 tions on the Efficacy of Lime in Powder applied to Fruit 

 Trees. By Mr. Samuel Curtis. 



Account and Description of five new Chinese Chrysanthe- 

 mums, with some Observations relative to the Treatment of 

 all the kinds at present cultivated in England ; and on other 

 Circumstances connected with the Varieties generally. By 

 Joseph Sabine, Esq. F.R.S. &c, Secretary. 



ASTRONOMICAL SOCIETY. 



April 9. — At this Meeting the following papers were read ; 

 viz. 



1st. On the Elements of the Orbit of the Comet of 1823, 

 computed from Observations made at the Royal Observatory 

 at Greenwich. By Mr. W. Richardson, Assistant to the As- 

 tronomer Royal. 



These elements were computed by Dr. Olbers's method. 

 The paper likewise contained a comparison of his elements 

 with the Greenwich Observations from January 1st to Fe- 

 bruary Cnd ; and in more than half the Observations, the re- 

 sults of the elements did not differ from them so much as 2' 

 in longitude, or so much as 1' in latitude. 



2d. On the Corrections requisite for the Triangles which 

 occur in Geodesic Operations. By Capt. George Everest, of 

 Bengal, Conductor of the Trigonometrical Survey in India. 



This paper contained the solution of two problems by for- 

 mula; employed in India since 1819, and which the author 

 thinks preferable to those given by M. Delambre for the same 

 purpose. They require the use merely of pocket Logarithmic 

 Tables, with four places of decimals, of which copious examples 

 wire given; and the paper concluded by the application of 



these 



