Efftft of Magnetifm on Thne-pieces. 21 



Philofophical Magazine is to render fome ferviec to a feience 

 which I at firft itudicd for amufement only, having never 

 been inftrucled in any part of it, and tor ibmc years without 

 the moft diftant idea of ever following it as a bufinefs. 

 Should it prove acceptable, I may perhaps follow it up with 

 a demonftration, and a few diagrams to illuftrate the fore- 

 going experiments, and to caft fome light on other branches 

 of this feience ; particularly on the various efcapements now 

 in ufe, and the advantages and difadvantages of their different 

 conftructions and applications in clock and watch work. In 

 doing this a compenfation for pendulums will be pointed out, 

 fimple and cheap in its conftru&ion, yet calculated to obviate 

 the inconveniences attending the ingenious but expenfive 

 contrivances that have hitherto been reforted to, and at the 

 fame time capable of the niceft adjuflment poflible. This 

 improvement, for fuch I confider it, will ferve at the fame 

 time to fliew how our very amufements, and the iludy of our 

 leifure hours, when directed to ufeful objects, though with 

 {lender abilities and under many difadvantages, may eventu- 

 ally be of fervice to our friends in particular, and beneficial 

 to fociety in general. 



Hatton-houfe, S. VARLEY. 



M«j> 31, 1798. 



P. S. As I am perfuaded a Journal carried on upon the 

 plan you have propofed cannot fail to be ufeful to the com- 

 munity, and as even hints may fomctimes pave the way to 

 greater improvements, I fhall look over my memorandums, 

 from among which I may perhaps be able to furnifh you 

 with fome, on a variety of fubjefts, for the amufement of 

 your fcientific readers. 



C 3 V. Method 



