Intellisence and Miscellaneous Articles. 2^1 



It may be remarked, that the time of the year is the most unfa- 

 vourable to the work of the engines; as from the abundance of water 

 in the mines, many are pushed beyond their most advantageous 

 rate. 



Duty of the best whim engines, rotatory, double, 6 millions drawn 

 1 foot high, by each bushel of coals, or 30 kibbles, drawn from the 

 depth of 100 fathoms by ditto. 



Duty of the best stamping engines, rotatory, double, 15 millions 

 lifted 1 foot high, by each bushel of coals. 



Note. — The monthly report of the duty of steam engines in 

 Cornwall, is taken and computed by Messrs. John and Thomas 

 Lean, who are specially appointed and paid for that purpose by 

 the adventurers in the mines, whose object is to obtain a correct 

 comparative statement, by which they may ascertain the merits of 

 the respective engines, and may judge of the skill and care of the 

 engineers they employ. 



Messrs, Leans have the custody of the keys of the counters on 

 the engines, they themselves measure the capacity and lengths of 

 the pumps, and they receive the returns of the quantity of coals 

 consumed from the persons who measure it, and make oath of the 

 consumption at the custom-houses for the debenture which is al- 

 lowed. 



The engineers whose names are given are not manufacturers of 

 engines, nor are they allowed to participate in any business of that 

 kind ; they plan the construction and superintend the execution 

 and erection of engines, for which they are paid according to the 

 power of each ; and they have the care of them after being erected, 

 and direct repairs, &c. for which they receive regular salaries from 

 the mines. 



The manufacturers who principally make engines for the mines 

 in Cornwall are : Messrs. Trevenan, Came, and Wood, Copper- 

 House Foundry, Hayle, Cornwall ; Messrs. Harvey and Co., Hayle 

 Foundry, Ditto ; Messrs. Price and Co. Neath Abbey Iron-works, 

 South Wales ; and Messrs. Fox and Co. Perran Foundry, Cornwall. 



NEW PATENTS. 



To Robert Barlow, of Jubillee-place, Chelsea, for a new combi- 

 nation of machinery, or new motion for superseding the necessity 

 of the ordinary crank in steam-engines, and for other purposes where 

 power is required. — Dated the 1st of February 1827. — 6 months 

 allowed to enrol specification. 



To John Frederick Daniell, esquire, of Gower-street, Bedford- 

 square, for improvements in the manufacture of gas. — 1st of Fe- 

 bruary. — 6 months. 



To John Oldham, of Dublin, for improvements in the construc- 

 tion of wheels for driving machinery impelled by water or wind, 

 also applicable to propelling boats, &c. — 1st of February. — 6 mon. 



To Ralph Hindmarsh, of Newcastle-upon-Tyne, master mariner, 

 for an improvement in the construction of capstans and windlasses. 

 — Ibt of February. — 6 months. 



To 



