154 A D I S q^U I S 1 T I O N on S.c. 



the abfurdity of thofe opinions we have all heard re- 

 peated thouiands of times, of wool being converted into 

 hair in the Weft Indies. 



From a comparifon of this with other fa£ls I am per- 

 fedly fatisfied that the varieties of this clafs of animals, 

 pofleffing very difiindl qualities infeparably connefted 

 with breed., are much greater, and infinitely more diver- 

 fified than has hitherto been fufpedted. Thtfoftficfs of 

 the Shetland wool is a peculiarity infeparable from it, 

 infomuch that in the coarjejl kinds of ftockings made of 

 this wool, which 1 have bought as low as four pence a 

 pair, of a fufficient fize for the largeft man, I could un- 

 dertake to diftinguifh them at the hrft by the feel, for 

 their fuperior foftnefs even above the fineft Spanilli wool. 



N°. XVIII. 



An eafy and accurate Method of adjufting the GlaJJes of 

 Hadleys ^adrant., on La?idfor the Back-Obfervation., by 

 HoBERT Patterson, /« aLetter to Dr. David Kit- 

 ten house, Frefident of the Society, 



April 1 8th, 1794. 

 Sir, 



Read April T^ HERE are few if any inftruments of 

 18, 1794- J[^ modern invention, of more extenfive ufe 

 in the meafuring of angles, than that invented by our 

 countryman, Mr. Godfry, but which has unjuflly got 

 the name of Hadley's quadrant. 



I have however often regretted, that for want of ibme 

 eafy and accurate method of adjufting the glafTes for the 

 back-obfervation, pradlicable on land, and applicable to 

 the comman o^iafit, this inftrument was ftill ib much 



limited 



