124 Dr. Fobes’ account ofa phenomenon of vision. 
of oxen. He could plainly discern the colour of the oxen, the rounds 
in the cart, the stones on the beach, and even the courses and joints 
in the shingles on the ware-house, This extraordinary degree ofacute, 
telescopic vision continued for about one hour ; after which his sight 
returned to its usual state. His health, which continued for some 
time after this in a low state, was finally restored ;' but from that mem- 
orable period to the present time he never could see to read or discern 
small objects without glasses, 
I received this account from Mr. Pier and from others acquaint- 
ed with him. I am told that he is a man of judgment and veracity, 
I should have risqued an attempt to.account for this curious phenom- 
enon from the structure of the eyeand principles of optics, but time was 
wanting. _ ‘But if the fact should be admitted, its solution may be the 
subject ofa future dissertation, with which I hope to offer a commu. 
nication, that was intended for this meeting, on the production of ore, 
in which is attempted a chemical investigation of its nature, growth, 
and generation, founded on experiments ; from which it is rendered 
more than probable, that the farmer will hereafter be able to raise a 
bed of bog ore as easily, as a bed of carrots. | es 
| I am, sir, with esteem, 
your most humble servant, 
PERES FOBES. 
Raynham, August 21, 1793. 
