[ J 39 ] 
Quid refert igitur, quantis jumenta fatiect 
Porticibus 
And both together, the ufe and detonation of the 
building, which is. the fubjed of our Infcription, 
basilica (i.e. porticus) eqvestris exercitato- 
BIA. 
As the Roman affairs in Britain are little known 
under this emperor ; one only Infcription befides, as 
I ohferved, either bearing his name, or referring to 
his age, thefe notices may poffibly be more wel- 
come. And what makes the firif Infcription more 
fo, is the mention of a new Legate, or lieutenant and 
pro-prastor, Valerianus, in this province, never taken 
notice of before. A copper Infcription lately difco- 
vered in the eftate of the D. of Norfolk in Yorkfhire, 
und now in his Grace s poffeflion, affords us another, 
and that a very remarkable perfonage, under the em- 
peror Hadrian, and one much known in the Roman 
hiflory. 
What was the pranomen of this Legate, 1. 9. is 
a matter of farther enquiry. 
XXIX. A Method of lejfening the Quantity 
of FriSiionin Engines , by Keane Fitzgerald, 
Ef r , R R. S. • 
ReadMayi 2 , *|i /TECH A NICS, or that branch of 
3 lyl mathematics which confiders mo- 
tions and moving powers, their nature and laws, is 
properly ditongufhed into rational, and practical. 
U 2 A know- 
