98 
Mr. Bennet's Experiments, &c , 
The greater sensibility, and easy construction, of a magnetic 
needle, suspended by a spider's thread, as above described, I 
hope, will contribute to extend magnetic observations, which 
may in time produce a true theory of this important branch of 
science ; while the very sensible air vane, from the same mode 
of suspension, may prevent the apparent attractions and re- 
pulsions, occasioned by currents of air, from being confounded 
with those of magnetism. 
