CONTENTS. 
vi _ 
IV. An Account ' of a Portrait of Copernicus, prefented to 
the Royal Society by Dr. Wolf of Dantzick: ex- 
tracted from a Letter of his to Mr. Magellan, F. R. S. 
P- 33 
V. An Account of a Journey into Africa from the Cape 
of Good-Hope, and a Defer ipt ion of a new Species of 
Cuclcow. By Dr. Andreas Sparrman, of the Royal Aca- 
demy of Stockholm, in a Letter to Dr. John Reinhold 
Forfter, F. R. S. p. 38 
VI. An Account of fome nezv EleSlrical Experiments. By 
Mr. Tiberius Cavallo: communicated by Mr. Henley, 
F. R. S. p. 48 
VII. A Third EJfay on Sea-anemonies. By the Abbe 
Dicquemare. p. 56 
VIII. Experiments and Obfervations in Electricity. By 
Mr. William Henly, F. R. S. p. 85 
IX. Extract of a Letter from John Strange, Ef quire , 
His Majejlfs Refident at Venice, to Sir John Pringle, 
Bart. P. R. S. : with a Letter to Mr. Strange from the 
Abbe Jofeph Toaldo, Profejfor in the Univerfity of 
Padua, &c. giving an Account of the Tides in the 
Adriatic. p. 1 44 
X. A Letter from Mr. Peter Wargentin, F. R. S. Secre- 
tary to the Royal Academy of Sciences at Stockholm, to 
the Rev. Nevil Mafkelyne, B. D. F. R. S. and AJlro- 
nomer Royal ; concerning the Difference of Longitude of 
the Royal Obfervatories at Paris and Greenwich, refult- 
ing from the Eclipfes of Jupiter’s jirjl Satellite . , obferved 
during the lajl Ten Tears: to which is added , a Compa- 
rative 
