XIV. Of the Gillaroo front. A L etter from the 
Hon. Daines Barrington, F . R. S. to the Rev , 
Dr. Horfley. p. i ] 6 
XV. Account of the Stomach of the Gillaroo front , 
by H. Watfon, F. R. S. In a Letter to Sir John 
Pringle. p. izj 
XVI. A Defcription of a petrified Stratum, formed 
from the PFaters of Matlock, in Derbyshire. By 
Mathew Dobfon, M. D. Communicated by Dr. 
Fothergill. p. 124 
XVII. Remarks on the Aurora Borealis . By J. S. 
Winn. In a Letter to Dr. Franklin. p. 128 
XVIII. Fxperiments concerning the different Efficacy 
of pointed and blunted Rods , in fecuring Buildings 
againft the Stroke of Lightning.. By William Hen- 
ley, F. R. S. p. 133 
XIX. Remarks upon a Baffage in Caftillione’s Life of 
Sir Ifaac Newton. By John Winthorp, LL. D .. 
Hollifian Profeffor of Mathematics , at Cambridge,. 
in New England. p. 153 
XX. M. De Luc’s Rule for meafuring Heights by the- 
Barometer , reduced to the English Meafure of 
Length , and adapted to Fahrenheit’s Thermometer,, 
and other Scales of Heat , and reduced to a 7 nore 
convenient ExpreJJion. By the Rev. N.. Malkelyne, 
F. R. S. AJlronomer Royal. p. 138 
XXL A Letter to the AJlronomer Royal from Samuel 
Holland, EJ'q. Surveyor General of Lands for the 
Northern DiflriB of America, containing fome 
Eclipfes of Jupiter’s Satellites , obferved near Que- 
bec. p. . 1 7 £1 
XXII. Obfervations of the Itnmerfions and Emerfions 
of the Satellites c/'Jupiter, taken in the. Tear jy68. 
