4'/'' Tunnel hene<ith the Thames.— 'AL: CcuivJrlght'j P-iJon. 



The kfl public meeting on the former bufinefs was held at th« London Tavern on the 

 J4,t}i of laft monih (December) ; when it appeared by the Report that the fubfcriptlons 

 amounted to upwards of ten thoufand pounds. '1 he managing committee of fubfcribcvs 

 confills of the Earl of Darnley, Lord fetrc, the Hon. J. T. Towniliend, M. P. the Hon. 

 Robert P£tre,i^ir William Gearyj Bart. M. P., Mr. Aid. Lufliington, M. P., John J. An- 

 gerftein, and Claude Scott, Efqrs. Lieut. Col. Twifs, Royal Engineers, Capt. Schank, R. N. 

 'T, Wootlruffe Smith, Efq , John R'lavor, Efq , Geo. Hawks, Efq , and Benjamin 

 Harrifon, £fq. — Claude Scott, Efq. is Treafurer. 



The undertaking will be begun and carried on by thofe who fliall firfl fubfcribe to the 

 propofed fliarea, wi^ich are three hundred at a hundred pounds each •, but the a^^ual work 

 will not be commenced till the whole fum of thirty thoufand pounds fli.ill have been fub- 

 fcribed. 



A fellow-labouier in the caufe of fcience, Mr. A. Tilioch, objefts totally to the account 

 'I gave^'-'Mp* Cartwright's apparatus for rendering the plllous of fleam-engines tight by 

 metallic fittings, at page 365 of the prefent volume. y\s the whole of his remarks appear 

 to me to be obvioufly erroneous, and the matter is before the public, I mull be excufed from 

 entering into controverfy. He will himfelf perhaps, on fccond thoughts, recollecl that a cir- 

 cle, even though in diameter equal to that of the earth, will not be converted into a triangle 

 by cutting it in three pieces ; and that it is abfurd to fuppofe the third law of nature, that 

 eB'wn and ri-a£iion are equal and contrary., can either be difpenfcd wither explained away. H<: 

 will then probably look (not to the vacuum, but) to the lower plate of Mr. Cartwright's 

 pifton for the re-aQion ; which, by means of the pifton rod and the work required to be 

 <lone, is made to aft beneath the moveable pieces of the apparatus, while the fleam preiTcs 

 their upper furface with no inconfiderable force; admitting its elafticity to be equivalent to a 

 Cngle atmofphere only: a force fufTicient, in my apprehenfion, to prevent ground furfaces from 

 Aiding freely, if at all, upon each other. But, as we are all liable to miflakes in new pra£tical 

 matters, 1 could have wilhed that Mr. Tilioch had rcafoned lefs diflufely, and referred at 

 once to the fa£ls. If it be true that there was a fleam-engine at work fix months ago, 

 when Mr, T. invited the public to infpe£l it, at Mr. Rowley's, in Cleveland-ftreet, Mary- 

 lebone* j or if he can bring evidence that fuch an engine has been at work for any cori- 

 fiderable part of the fime lince he publifhed his defcription, and that the facility of ope- 

 ration, the power, and the durability of the apparatus are fuch as he conceives them to 

 be ; — ^I cannot but think that he has, unfortunately, overlooked his beft argument. To this 

 argument, if ofFered, 1 mufl grant my alTcnf, and I beg leave to allure him that I Ihall 

 moll readily attend, infpe£l, and report concerning this engine, if he or the invenpot will 

 give me the opportunity, without in the leafl regarding whether this part of my duty to 

 the public fliall confirm or overthrow thofe opinions which the prefent flate of the fadshas 

 compelled me to give. 



• I went there at the time, and faw the parts of a fmall model or engine, which was not at work; and, 

 upon late enquiry, I underftand there is none there at prefent. I could gain ivo informition whether there 

 vvai any engine ofthis conllruftion at work, or in progrefs, at any other place. 



