86i 



ANNUAL REGISTER, 1805. 



<cr, but resumed it in April. In 

 the autumn of 1790 the chamber 

 {'xcavated in the inside of the rock 

 had the following dimensions. 



Greatest depth .... 36 feet. 

 Depth to the level of the 



pa?sa<!;e .... 26 

 Greatest diameter of the 



chamber . . . . JS 

 Least diameter ... 3 



Four men in two hours emptied 

 the pit of water by the windlass, 

 at. the rate of four tons in a minute ; 

 towards tho entj. of uliirh time sis 

 ncn drove it from tlic bottom of 

 the pit, and poured it into the pas- 

 saj^e. After drawing off the -water 

 tluy worked six hours more on the 

 r<Jck. From one tide to nnotlier 

 they raised about thirty sacks of 

 ore, each sack containing fourteen 

 gallons ; fifteen sixteenths of which 

 -were so rich tiiat tiicy produced 

 one sixth of a hundrod weight of 

 tin, and one-sixteenth of a hundred 

 ■was procured from the remaining 

 part ; so tJiat in six m.ouths they ' 

 raised to tiie value of GOO/, sterling 

 «f tin. As most of the ore was in- 

 terspersed in a hard rock, diOiciilt 

 to pound, the undertaker had it 

 roasted in a common lime-kiln, 

 ■which answered perfectly well. There 

 was notiiing of this kind done in 

 Cornwall before. 



What I have related is what I 

 myself saw of this singular work, 

 which is known by the name of 

 Hue/- fern/. One of my friends, who 

 is in that part of the country, wrote 

 me as follows, in 1792. 



" We have hopes that the work 

 *' on the vein of ore mixed with 

 *' porphyry will become hereafter 

 ^' very profitable. Tt is found on 

 ^' bqth sides of the pit for a. great 



" extent ; the old Avork is still con- 

 " tinned, and the mine is still rich. 

 " A house near the shore, built of 

 " stones collected on the beach, 

 " and with the fragments from the 

 " top of the vein, is going to be 

 " thrown down, on account of the 

 " abundance of tin contained in 

 " those stones. One of the agents 

 " told me that in the last summer 

 " they raised 3000/. worth of the 



(( 



ore. 



In another letter, the same per- 

 son writes, " They arc construct- 

 " ing a steam-engine on the shore 

 " opposite the mine : a wooden 

 " bridge serves to go to the rock, 

 ''• till the pit of the steam-engine 

 " and the adit from it, which they 

 " are going to run to the mine, are 

 " finished."' 



The .extraordinary maa who con- 

 ceived and executed the work, I 

 have related, died in the winter of 

 179], aged 70 years. 



Observations on the Dry Rot in Tim- 

 bcr^ and Means of curing or pre- 

 I'ciiling it. From the Transactions 

 of the Socictii for the Encourage-, 

 mcnt of Arts^ Manufactures^ and 

 Commerce. 



The mischief ."irising In buildings 

 from that decay in the timber and 

 wood work, known in general by 

 the name of the dry rot, has been, 

 and yet continues so great as to de. 

 mand every attention fur its pre- 

 vention. Some valuable facts fur- 

 nished by Robert j|5atson, esq. of 

 Limehouse, respecting the methods 

 be took to prevent this fvil, in one 

 of his rooms greatly atfccted by it, 

 claims particular notice. The plan 

 he adopted was to charr the ends of 

 his timbers, to take away the in- 



fccte4 



