INDEX. 
- Approach , the gradual, of the Earth to the Snn, n. 493, 
p. 204. 
Arch) a luminous, Feb. 1$, 174 9. by Dr. Wm. Cooper , 
, »• 497) P- ^47- 
Arderon (Mr. JFw.) of the Roman Camp at C aft or in 
Norfolk , ». 493, p. 1 9 <5. 
■ Account of a Dwarf, ». 495, p. 4 6J. 
-of the hot Weather in July 1750, n. 496, p. 573. 
of an Explojion in the Air, heard a t Norwich, June 
7 ; * 75 0 > 491 , P • ^98- 
Arithmetical Inftrument, the Shwan-pan, by Mr. Smc- 
thurjl , 491, p. 22. 
an extraordinary Cafe of the Erasure of one, by 
Mr. Freke , n. 494, p. 3 98. 
Avoirdupois , the legal and ancient Standard Weight, n. 
49 1 >/>• 54- 59- 
the Ounce the fame as the Roman , ibid. p. 69. 
Whence its Name, ib. p. 68. 
Aurora Auftralis , feen at Chelfea , Jan. 23, 1749-50, by 
John Martyn , 494, p, 319 — Feb. 16, ib. p. 345. by 
the fame. — 23, 1750-51, by Dr. Henry Miles , 
ib. p. 34 6. 
Borealis at Northampton , obf. by Dr. Doddridge , 
»• 497) A 
Aurorje Bore ales, Abftrafls of feveral Obfervations on 
them, //. 495, p. 499 — 505. 
B. 
(Mr. Henry) of fome Vertebra of Ammonita , or 
Cornua Ammonis , //. 49 1 , p. 3 7. 
of the Minutenel’s of the Seeds in fome Plants, ». 
494) P- 337- . 
. Abltrafts of feveral Obfervations of Aurora Bo- 
reales, n. 495, p. 499— 505. 
— ~ ot anEarthquake at London , Feb. 8, 1749-50, 11.497, 
p. £01 .— March 8, 1749-50, ib. p. 617 . — at }Y inbourn 
in Dorfctjbire , /htey 4, 1749, p* <589. 
Ball of File in the Air, n. 497, p. 728. 
Barker , 
