Sweden —Berlin——Gottin en. 197 
INSCRIPTIONS AND DEVICES. 
. * 7, Hints refpeéting a Latin infcription for the Exchange 
at Stockholm. 
“2. Hints refpecting medals to commemorate the moft 
remarkable events which have taken place in Sweden in the. 
prefent century ; to be chofen at the option of the author.” 
The prize is a gold medal of the value of 12 ducats.—Thofe 
who with to become candidates for this prize muft fend pro- 
pofals refpeGting both the above fubjeéts, otherwife their 
works cannot be laid before the Academy for examination, 
The papers on all thefe fubjects muft be tranfmitted, to 
the Academy with devices, and accompanied with the names 
of the authors, each ina fealed note, before the 20th of 
January 1799. 
BERLIN. 
The Society of the Searchers into Nature have propofed 
the following queftion, to be anfwered before the firft of Ja- 
nuary 1800, as the fubje& of a prize :—‘‘ Allowing that 
electricity is requifite for the production and formation of 
hail in the atmofphere, can any hopes be entertained of reny 
dering the clouds incapable of producing it, and of prevent- 
ing its formation by means of conduétors, fuch as thofe 
ufed for preventing the effects of lightning? what are the 
means to be employed for this purpofe? and what obferva~- 
tions and data, in general, have we on this head worthy of 
being taken into confideration ?”’—The prize is 20 ducats, 
GOT TINGEN. 
ASTRONOMY. 
{n the month of December of the laft year, Dr. Schroter 
of Lilienthal tranfmitted to the Royal Society at Gottingen 
feveral aftronomical obferyations, the moft important of 
which were the following : : 
Dr. Schroter obferved at different times, and with the 
te certainty, in Jupiter’s four fatellites, even in both the 
03 fmallett, 
