326 On a Wool Micrometer. 
The drawings accompany the instrument; and di- 
rections for using it. 
Iam, Sr, 
Your obedient servant. 
RicuHarD PETERS. 
Dr. James MEASE. 
Secretary to the Philad. Soc. for promoting Agriculture. 
We have not yethad 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 +25 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. 
