352 SCIENTIFIC NEWS. 



Greek manu. be asked, with Mr, Kotzebue, whether the thousand manu- 

 seiip s. scripts collected by Constantine be of the same description ? 



what may have become of those which he presented to the 

 \ schools ? and whether the htill inore numerous collection of 



Jaroslas I. be not still in the church of St. Sophia? The 

 desire expressed by this learned journalist, that all con- 

 vents in Russia might be ordered to give catalogues of their 

 libraries, will be sincerely adopted by all' the lovers of litera- 

 ture. It is more than probable, that some very valuable 

 remains of Greek literature would be by this means restored. 



TO CORRESPONDENTS. 



J^^°"^*PO"- Prom the great accession ofOnglnal Correspondence, It becomes 

 necessary to take notice of several Communications that have 

 not been, immediately' inserted ; most of which luill appear in 

 the next. and the Si/pphme7itary Number. They are, 



1. Account of the Treatment of Lend Ores; with Draw- 

 ings of Furnaces : By Mr. John Sadler.— 2. A Dissertation on 

 the Claitns of Robert Hooke^ Harrison, and ethers, to some of 

 ihe principal Inventims in Chronometfy : By Mr. Thomas Bead, 

 of Edinburgh. — ^. New Experiments on the Propagation of 

 Heat in Liquids; ivith a Drawing: By Benjamin Count 

 of Bumford.—^. Experiments and Observations on the Adhc' 

 sions of the Particles of Water to each other : By Bc7ijamin 

 Count of Rum ford:— '5. Remarks on Achromatic Eye-pieces: 

 By David Brewster, A. M. N. B. This gentleman informs 

 me that he has lately invented a new Telescope., capable of 

 measuring distances from two Stations, with the greatest 

 facility and accuracy. — 6. A Method of ventilating Tents: 

 By Lieutenant William Collins. — *, T^vo Communications 

 from H. B. K. on Galvanic and Chemical Subjects. -^S. Some 

 Speculations from a Correspondent, L. upon certain Anomalies 

 in the Specific Gravities of Water and other Bedies. — p. A 

 new Method of rendering the wide and narrow Vibrations of 

 an Helical Spring equal in Duration: By Mr. Hardy. — 10, 

 An Improvement in the inflammable Air Lamp of Volta : By Mr^ 

 Singer. 



