(M4) 
that import the contrary ; The Writer thereof hath though 
fit , exprefly here to declare * that that perfmfion , if 
there be any fuch indeed, is a meet mifiake ; and that 
he, upon his Private account fas a Well-mfher to the 
advancement of ufefull knowledge , and a Furtherer 
thereof by fuch Communications, as he it capable to fur- 
nifl) by that P hi lofophical Correfpondency, which he enter- 
tains, and hopes to enlarge') hath begun and continues both 
the compofure and publication thereof: Though he denies 
not , but that , having the honour and advantage of being 
a Fellow of the faid Society, he inferts at times fome of 
the Particulars that are prefented to them ; to wit, fuch as 
he knows he may mention without offending them, or tranf- 
gr effing their Orders ; tending only to adminifer occafion 
to others alfo , to confider and carry them further , or to 
Obferve or Experiment the like-) according as the nature of 
fuch things may require * 
Printed with Licence for John Mariyn^wd Jams Alleflry , 
Printers to the Royal Society. 1 666. 
