[ 77 2 ] 
In this treatife Mr. Lomonofow, among other 
phenomena of electricity, takes notice, that he once 
faw, in a ftorm of thunder and lightning, brufhes 
of electrical fire with a hilling node, communicate 
between the iron rod of his apparatus and the fide 
of his window ; and that thefe were three feet in 
length, and a foot in breadth. EfFeCts like thefe 
no one but himlelf has had the opportunity of ob- 
ferving. 
XC. ExtraEl of a Letter from John Henry 
Winkler, Profejfor of Natural Philofophy 
at LeipHc, and Fellow of the Royal So- 
ciety, to Thomas Birch, D. D. Secretary 
of the Royal Society , relating to Two elec- 
trical Experiments ; tranfated from the 
Latin. 
Read July 4, Xranfmit to 
* 754 - 
I 
Leipfic, May 22, 1754. 
you, Sir, the account 
of two electrical experiments, both 
which I made the prefent year. They are founded 
upon the famous experiment of Leyden. 
On January 8, 1 fprinkled a plate of metal with 
the feeds of * club-mofs. To this plate I connected 
a chain, which communicated with the coating of 
the Leyden bottle of water. I afterwards fufficiently 
eleCtrifed this water to make the artificial thunder, 
* Lycopodium, Club-mofs, Wolfs-claw. 
of 
