326 0« a Wool Micrometer. 



The drawings accompany the instrument ; and di- 

 rections for using it. 



I am, Sir, 



Your obedient servant. 



Richard Peters. 

 Dr. James Mease. 

 Secretary to the Fhilad. Soc. for protJioting Agriculture. 



We have not yet had time to arrive at a perfect know- 

 ledge of this micrometer, so as nicely to discriminate between 

 the samples of wools. The filament sent with the instrument 

 is T^^^ parts of an inch, in fineness. The wool of my ewe 

 No. 2 in the plate, is agreed, by all who have viewed its fila- 

 ment through this micrometer, to be several degrees finer 

 than that accompanying that instrument. 



R. P. 



