[ xxii ] 



The Reverend Mr. Cook, (a defcription of 

 whofe drilling machine was given in our laft 

 volume) having furniihed for this publication 

 an ample account of the fuccefs attending the 

 ufe of that machine; we infert the fame on a 

 principle of impartial juftice to him, and of 

 unbiafled attention to the public advantage. 



To Mr. Woodbine, Mr.WAGSTAFFE,Mr. 

 Crocker, Mr. Hazard, Mr. Webb, Mr.PoT- 

 ticary, Mr. Andrews, Mr. Kirkpatrick, 

 Mr. Triffry, Mr. Baker, and various other 

 correfpondents whofe names do not appear, 

 the Society owes a return of acknowledge- 

 ments for their obliging mifcellaneous com-, 

 munications -, — fuch acknowledgments are 

 cordially returned, whatever reafons may have 

 induced an omiffion of fome articles, both 

 well intended and refpeftably written, 



Laftly, we have to acknowledge very parti- 

 cular obligations to Dr. Falconer, for the 

 excellent Eflfay with which this volume con- 

 cludes . The co-incidence of the Do£tor 's de- 



fign 



