1890.] dnriiKi '/'Jtmuleratorms, and on the Brontometer. *>7 



of the changes of temperature is greatly reduced by the chamber 

 being surrounded with 4 in. thick of non-conducting material, besides 

 neirly 1 in. of wood outside of it. The change of temperature in 

 a room, and during the short time that the statoscope will be worked 

 without resetting to zero (i.e., without opening the tap), has not 

 hitherto produced any measurable effect. 



The author hopes, in a subsequent paper, to have the honour of 

 laying before the Society the results obtained from this novel 

 apparatus. 



Appendix. 

 List of some Papers and Memoirs on the subject of the Paper. 



PIANKE, J. J. " Obs. Oscillationis Mercurii in Tubo Torricelliano Erforcliw 

 institula." ' Acta Acad. Moguntinse,' 1782- 8. 



ROSENTHAL, G. E. [" Merkmale fur das Herannahen d. Gewitter."] 



' Mag. Neueste Physik,' vol. 4, Part I, 178G. 

 TOALDO, GK " Dei moti del Barometro nei Temporal!. " 



' GHornale Astro-Meteorologico,' 1794. 



(The note is dated April 3rd, 1795 ; see also his collected works ' Completa 

 Raccolta, &c.,' Venezia, 4 vols., 8vo., 1802, vol. 3, p. 104, and vol. 4, p. 41.) 

 FBHNZEL, F. C. [" Veraiiderung d. Barometerstandes bei Gewittern."] 



Q-ren's ' Neues Journal der Phjsik," vol. 4 (1797), p. 250. 

 GBOXAU, K. L. " Ueber die Gewitter in den Gegenden von Berlin." 



' Schweigger's Journal,' vol. 31 (1821), p. 128. 

 STBEHLKE, F. " TJeber d. Einfluss d. Gewitter auf den Barometerstand." 



' Poggendorff's Annalen,' vol. 19 (1830), p. 148. 

 KAKMT/, L. F. 'Lehrbuch der Meteorologie,' vol. 1 (1831), p. 351. 

 JOHNSON, M. J. " On the Detection and Measurement of Atmospheric Electricity 

 by the Photo-barograph and Thermograph." . 



' British Assoc. Report,' 1855, Part II, p. 40. 



' Meteorological Observations made at the Radcliffe Observatory, Oxford,' 



1857, p. 34. 

 GOULLON. " Elevation brusque du Barometre pendant un Coup de Tonnerre." 



' Bulletin International,' Mars 21, 18G6. 



WHITEHOTTSE, W. " On a new Instrument for recording minute Variations of 

 Atmospheric Pressure." ' Roy. Soc'. Proc.,' vol. 19 (1871), p. 491. 



ABEBCBOMBY, Hon. R. " On the Barometric Fluctuations in Squalls and Thunder- 

 storms." ' Meteor. Soc. Quart. Journ.,' vol. 2 (1875), p. 450. 

 FIHES. " Courbes du Barographe Redier a Perpignan pendant les Orages des 7 et 

 11 Juillet, 1877." ' Quinzaine Meteorologique,' 1877, p. 66. 

 MASCABT, E. " Sur 1'Inscription des Phenomenes Meteorologiques, en particulier 

 de 1'filectricite et de la Pression." 



\ 'Journal de Physique,' vol. 8 (1879), p. 329 ; and ' Annuaire de 



la Soc. M't. de France,' vol. 28 (1879), p. 7. 

 SCHEKZL, G. " Ungewitter vom 23 Februar, 1879." 



' Zeits. d. Oesterr. Gesells. f. Meteor.,' vol. 14 (1879), p. 146. 

 RENOU, E. [Diagrams only.] 



1 Annales du Bureau Central Meteor.,' 1880, Part I. 



F 2 



