g3a Sflenllfic Ntwtt ^ceomis of Booh^ &t> 



Philofophicai TranfaB'tons of the Royal Society of London for the Tear 1 800. Port the Firjt, 

 ^tarto, 238 Pages, ivith eight Plates, and a Meteorological Journal. London, fold by, 

 Elmfley. 



This part contains: — i. The Croonian Ledlure. On the Struflure and Ufes of the 

 Membrana of the Tympani of the Ear. By Everard Home, Efq. F. R. S. 2. On the 

 Method of determining from the real Probabilities of Life, the Values of contingent Re- 

 verfions, in which three Lives are involved in the Survivorflup. By William Morgan, 

 Efq. F. R.S. 3. Abfl:ra£l of a Regifter of the Barometer, Thermometer, and Rain, 

 at Lyndon, in Rutland, for the Year 1798. By Thomas Barker, Efq. 4. On the Power 

 of penetrating into Space by Telefcopes j with a comparative Determination of the 

 Extent of that Power in natural Vifion, and in Telefcopes of various Sizes and Conftruc- 

 tions; illuftrated by fele£l Obfervations. By William Herfchel, LL. D. F. R. S. 5. A 

 fecond Appendix to the improved Solution of a Problem in Phyfical Aftronomy, infert«d 

 in the Philofophicai Tranfadions for the Year 1798, containing fome further Remarks' 

 and improved Formulse for computing the Coefficients A and B ; by which the Aritlj- 

 nietical Work is confiderably ftiortened and facilitated. By the Rev. John Hellins, B. D. 

 F. R. S. and Vicar of Potter's Perry, in Northamptonftiire. 6. Account of a Peculiarity 

 in the Diftribution of the Arteries fent to the Limbs of flow-moving Animals; together 

 with fome other fimilar Fads. By Mr. Anthony Carlifle, Surgeon. 7. Outlines of 

 Experiments and Inquiries refpeding Sound and Light. By TRomas Young, M. D. 

 F. R. S. 8. Obfervations on the . ElFe£ls which take Place from the Deftrudion of 

 the Membrana Tympani of the Ear. By Mr. Aftley Cooper. In a Letter to Everard 

 Home, Efq. by whom fome Remarks are added. 9. Experiments and Obfervations 

 on the Light which is fpontaneoufly emitted, with fome Degree of permanency, from 

 various Bodies. By Nathaniel Hulme, M. D. F. R. S. and A. S. 10. Account of a 

 Series of Experiments, undertaken with the View of decompofing the Muriatic Acid. 

 By Mr. William Henry. (Philof. Journal, IV. 209.) 11. On a new fulminating Mercury- 

 By Edward Howard, Efq. F. R. S. Ibid, IV. Appendix. Meteorological Journal kept at 

 the Apartments ai the Royal Society by order of the Prefident and Council. 



' Royal Society of Copenhagen, 



The Royal Society of Copenhagen not having received anfwers to its queftions on hlf- 

 tory, mathematics, and natural philofophy, which were propofed laft year, repeat the 

 fame queftions for the prefent year. 



1. Hijlory. — What people difcovered America, and travelled into that part of the world 

 before the Norwegians ? How far did the difcoveries of the Norwegians extetid In America, 



particularly 



