mil C G N T E N T S. 



XVI. A Letter from. John Zephaniah Hoi well, 

 Efiqy F. R. S. to John Canipbd, E#j F. i?. S. 

 giving an Account of a new Species of Oak. 



p. 128 



."XVII. An Account of the Death of a Per fan de/lroyed 

 by Lightning in the Chapel in Tottenham-Court- 

 Road and its Effects on the Building ; as obfrved 

 by Air. William Henly, Mr. Edward Nairne, and' 

 Mr. William Jones. The Account written by Mr. 

 Henly. p. 13 1 



XVIII. A Letter from Thomas Ronayne, Efq-, to 

 .Benjamin Franklin, LL. D. F. R. S. inchfing an 

 Account of fome Obfervations on Atmofpherical 

 Electricity ; in regard of Fogs, Mifls, &c. with 



fome Remarks j communicated by Mr. William 

 Henley. p. 137 



XIX. Obfervations on different Kinds of Air : By 

 Jofeph Prieftley, LL. D. F. R. S. p. 147 



XX. An Effay on the periodical Appearing and Dif 

 appearing of certain Birds, at different Times of the 

 Tear, hi a Letter from the Honourable Daines 

 Barrington, Vice-Pref. R. S. to William Watfon, 

 M.D. F.R.S. p. 265 



XXII. KOSKINON EPATOE0ENOTX, or, the Sieve 

 of Eratofthenes. Being an Account of his Method 

 of finding all the Prime Numbers ; by the Rev. 

 Samuel Horfley, F. R. S. p. 327 



XXIII. A Letter from Mr. Chriftopher Gullet to 

 Mathew Maty, M. D. Sec. R. S. on the Efcts of 

 Elder , in preferring Growing Plants from Infects 

 /itzd Flies. p. 348 



XXIV. A 



