404 Miscellaneous Intelligence. 



forth to the prejudice of our reputation and business, through 

 the widely-extended circulation of the Quarterly Review ; we 

 have enclosed you the papers on which the author of the note 

 states that his opinion has been formed, that the real operator 

 was neither Mr. Molyneux nor ourselves, but some third person. 

 Mr. Molyneux's acknowledgment that he never saw the chro- 

 nometers, is decisive as to his concern in them. If we knew 

 what third person can have been supposed the maker, we would 

 meet the supposition by obtaining a denial from the individual 

 himself. 



We are ready, Sir, to give you, or the author of the note, any 

 reasonable proof that mav be required, that (with the exception 

 of the springs of Nos. 253 and 254, which were obtained from 

 Mr. Hopkins, whose distinct branch of the trade it is to supply 

 springs to chronometer makers, and for which springs he received 

 21. 10s. each), the four chronometers were our own workmanship, 

 made in our own house, under our own direction, by workmen 

 whom we have instructed, and that they were all finally adjusted 

 and corrected by ourselves. We have laboured unceasingly 

 since our entrance into life to become good artists, and to ap- 

 prove ourselves such to the public. The adventure of our pro- 

 perty in the late voyage is a proof of our confidence in the ex- 

 cellence of our chronometers, and of our anxiety to establish our 

 reputation. We cannot, therefore, but feel deeply when we see 

 the credit which wc have laboured to deserve, ascribed to some 

 unknown person ; and when we find the encouragement to our 

 business, which we were receiving from the public, withheld in 

 consequence of the promulgation of an opinion which has cer- 

 tainly no foundation in fact. 



We hope that you will not refuse to satisfy yourself of the 

 truth of this statement. 



We are. Sir, 

 Your obedient servants, 



Parkinson and Frodsiiam. 



2. Steam Engines of England. — M. Dupin, whilst speaking of 

 the immense mechanical force set in action by the steam engines 

 of England, gives the following illustration of its amount. The 

 great pyramid of Egypt required for its erection the labour of 

 above 100,000 men for twenty years: but if it were required 

 again to raise the stones from the quarries and place them at 

 their present height, the action of the steam engines of England 

 which are managed at most by 36,000 men, would be sufficient 

 to produce the effect in eighteen hours. And M. Dupin says, 

 that if it were required to know how long a time they would 

 take to cut the stones and move them from the quarries to the 

 pyramid, a very few days would be found sufficient. 



The calculation of M. Dupin is as foUov/s : the volume of the 



