432 ESSAYS AND OBSERYATIONS 



*' day^ and about the fame time ; but the 

 " fh(znomenon was not fo minutely obferved 

 *' as that any exad: account can be got of it. 

 " This relation of Mr. Macfarlane% of the 

 " phanomcnon^ contains in it every thing re- 

 *' markable I have as yet heard concern- 

 *' ing it. 



4. Letter from Mr. Mark M'^Callum to 

 George Clerk, Efq-, concerning an wi- 

 ufual jnotion of the Waters of the Frith of 

 ■Forth at Qoeens-ferry, [even miles iveft of 

 Edinburgh, on the ijl of^ow emhcr 1755.' 



SIR, 



" 'T~^0 the beft of my remembrance, on 

 " Saturday the fir ft of November , a- 



*' bout ten o'clock before noon, being then 

 " on the pier at ^leens-Ferry^ I obferved the 

 " water to rife very fuddenly, and return 

 " again with the fame velocity about a 

 V foot or eighteen inches perpendicular, as 

 *' near as I can remember ; the barks and- 

 " boats then afloat ran forwards and back- 

 *' wards with great rapidity, and this conti- 

 *' nued for the fpace of three or four mi- 

 *' nutes J but after the fecond or third rufh 



