248 Mr. Thompson’s Experiments 
diftance, and I was unwilling to expofe any part of the appa- 
ratus in the open air. 
But the fcreen was found to anfwer perfectly well the pur- 
pofe for which it was defigned, and it was continued during the 
remainder of the experiments, the paper being replaced every 
third or fourth experiment. 
"The experiments continued. 
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Remarks. 
Not lcatheied ; weight of the 
bullet and wad 603 grs. In exp 
3 S° 32. uo lefs than 40 large grs 
of unfired powder were driven 
through the fcreen. 
In thefe 6 experiments the 
bullets were leathered, 
and the powder was 
lighted by the valve- 
vent. 
The pend. N° 2. ruined. 
The bullets Were now put naked into the piece, and the 
powder was lighted by the fhort vent-tube (a;, fig. 3 ) and fome 
little improvement was made in the fteel edges between which 
the ribbons paffed that ferved to meafure the afeending arcs of 
the pendulum and of the recoil, by which means the friftion 
was leflened, and the ribbon was prevented from twifting or 
entangling itfelf as it was drawn out* 
3 
Appairatu 
