IdcntiJiiatio)i of tli^' British Inch as the Unit of Alcasmc. 153 



knowledge to be relied on as accurate. This manuscript he shortly 

 after published, and as 1 now recollect, found uijon measuring his 

 '■'■factor tucasitrc,'' that it was 30 British inches. By this it will be 

 seen that two trials for such a standard, independent of each other, 

 result in finding e.xact multiples of a common unit, viz.: the British 

 inch. 



APPENDIX A. . • 



The HisTOi^Y OF ihe "Gridley Measuring Stone," or the El- 

 liptical Stone found in 'ihe Fifth and Mound Street 

 Mound, in the City of Cincinnati. 



In the collections of Indian relics belonging to the Cincinnati 

 Society of Natural History, is a small one, each member of which 

 bears the printed form of label belonging to the old society called 

 The Western Academy of Natural Sciences, formerly existing in 

 the same city. The members of this small collection are labeled 

 as follows : " No. 3, Indian relics deposited by C. P. Gridley," 

 "No. 5, Indian x'Vntiquities deposited by C. P. Gridley." "No. 6, 

 Mound relics deposited by C. P. Gridley." "No. 7", Mound 

 relics deposited by C. P. Gridley." "No. 12, Mound, Fifth 

 street, deposited by C. P. Gridley." "No 13, Mound, Fifth 

 street, deposited by C. P. Gridley." Of these the semi-elliptical 

 stone measure of the text, the measures of which are there given 

 by 9 and 12 inches, is the one labeled as "No. 5." This group, 

 or small collection, passed with the rest of the collections belong- 

 ing to The Western Academy of Natural Sciences into the possess- 

 ion of the Cincinnati Society of Natural History on its organiza- 

 tion, and has been in that possession ever since to this date, Feb- 

 ruary, 1883. This collection so labeled, consists of three frag- 

 ments and two entire specimens; the two that are entire, being, 

 tirst, the semi elliptical stone measure, or the "Gridley Measure." 

 and second, a fine slate relic, of a shape lately described by Mr, 

 Gridley. 



'J'he current tradition relative to this group has been that it 

 consists of relics which were found in the Fifth and Mound Street 

 Mound. Little if any especial attention has ever been paid to 

 these relics. They have to appearance nothing to attract more 

 than a passing glance, and seem valuable only in the general sense 

 of being veritable Indian remains pertaining to our locality. Be- 



