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С˵£º industrial biography ×ÖÊý£º ÿҳ3500×Ö

°´¼üÅÌÉÏ·½Ïò¼ü ¡û »ò ¡ú ¿É¿ìËÙÉÏÏ·­Ò³£¬°´¼üÅÌÉ쵀 Enter ¼ü¿É»Øµ½±¾ÊéĿ¼ҳ£¬°´¼üÅÌÉÏ·½Ïò¼ü ¡ü ¿É»Øµ½±¾Ò³¶¥²¿£¡
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the¡¡greatest¡¡importance¡¡in¡¡tool¡¡and¡¡machine¡¡making¡£¡¡¡¡Nothing¡¡pleased

him¡¡more¡¡in¡¡his¡¡after¡¡life¡¡than¡¡to¡¡be¡¡set¡¡to¡¡work¡¡upon¡¡an¡¡unusual

piece¡¡of¡¡forging£»¡¡and¡¡to¡¡overcome£»¡¡as¡¡none¡¡could¡¡do¡¡so¡¡cleverly¡¡as

he£»¡¡the¡¡difficulties¡¡which¡¡it¡¡presented¡£¡¡¡¡The¡¡pride¡¡of¡¡art¡¡was¡¡as

strong¡¡in¡¡him¡¡as¡¡it¡¡must¡¡have¡¡been¡¡in¡¡the¡¡mediaeval¡¡smiths£»¡¡who

turned¡¡out¡¡those¡¡beautiful¡¡pieces¡¡of¡¡workmanship¡¡still¡¡regarded¡¡as

the¡¡pride¡¡of¡¡our¡¡cathedrals¡¡and¡¡old¡¡mansions¡£¡¡¡¡In¡¡Maudslay's¡¡case£»¡¡his

dexterity¡¡as¡¡a¡¡smith¡¡was¡¡eventually¡¡directed¡¡to¡¡machinery£»¡¡rather

than¡¡ornamental¡¡work£»¡¡though£»¡¡had¡¡the¡¡latter¡¡been¡¡his¡¡line¡¡of¡¡labour£»

we¡¡do¡¡not¡¡doubt¡¡that¡¡he¡¡would¡¡have¡¡reached¡¡the¡¡highest¡¡distinction¡£



The¡¡manual¡¡skill¡¡which¡¡our¡¡young¡¡blacksmith¡¡had¡¡acquired¡¡was¡¡such¡¡as

to¡¡give¡¡him¡¡considerable¡¡reputation¡¡in¡¡his¡¡craft£»¡¡and¡¡he¡¡was¡¡spoken

of¡¡even¡¡in¡¡the¡¡London¡¡shops¡¡as¡¡one¡¡of¡¡the¡¡most¡¡dexterous¡¡hands¡¡in¡¡the

trade¡£¡¡¡¡It¡¡was¡¡this¡¡circumstance¡¡that¡¡shortly¡¡after¡¡led¡¡to¡¡his¡¡removal

from¡¡the¡¡smithy¡¡in¡¡Woolwich¡¡Arsenal¡¡to¡¡a¡¡sphere¡¡more¡¡suitable¡¡for¡¡the

development¡¡of¡¡his¡¡mechanical¡¡ability¡£



We¡¡have¡¡already¡¡stated¡¡in¡¡the¡¡preceding¡¡memoir£»¡¡that¡¡Joseph¡¡Bramah

took¡¡out¡¡the¡¡first¡¡patent¡¡for¡¡his¡¡lock¡¡in¡¡1784£»¡¡and¡¡a¡¡second¡¡for¡¡its

improvement¡¡several¡¡years¡¡later£»¡¡but¡¡notwithstanding¡¡the¡¡acknowledged

superiority¡¡of¡¡the¡¡new¡¡lock¡¡over¡¡all¡¡others£»¡¡Bramah¡¡experienced¡¡the

greatest¡¡difficulty¡¡in¡¡getting¡¡it¡¡manufactured¡¡with¡¡sufficient

precision£»¡¡and¡¡at¡¡such¡¡a¡¡price¡¡as¡¡to¡¡render¡¡it¡¡an¡¡article¡¡of

extensive¡¡commerce¡£¡¡¡¡This¡¡arose¡¡from¡¡the¡¡generally¡¡inferior¡¡character

of¡¡the¡¡workmanship¡¡of¡¡that¡¡day£»¡¡as¡¡well¡¡as¡¡the¡¡clumsiness¡¡and

uncertainty¡¡of¡¡the¡¡tools¡¡then¡¡in¡¡use¡£¡¡¡¡Bramah¡¡found¡¡that¡¡even¡¡the¡¡best

manual¡¡dexterity¡¡was¡¡not¡¡to¡¡be¡¡trusted£»¡¡and¡¡yet¡¡it¡¡seemed¡¡to¡¡be¡¡his

only¡¡resource£»¡¡for¡¡machine¡­tools¡¡of¡¡a¡¡superior¡¡kind¡¡had¡¡not¡¡yet¡¡been

invented¡£¡¡¡¡In¡¡this¡¡dilemma¡¡he¡¡determined¡¡to¡¡consult¡¡an¡¡ingenious¡¡old

German¡¡artisan£»¡¡then¡¡working¡¡with¡¡William¡¡Moodie£»¡¡a¡¡general

blacksmith¡¡in¡¡Whitechapel¡£¡¡¡¡This¡¡German¡¡was¡¡reckoned¡¡one¡¡of¡¡the¡¡most

ingenious¡¡workmen¡¡in¡¡London¡¡at¡¡the¡¡time¡£¡¡¡¡Bramah¡¡had¡¡several¡¡long

interviews¡¡with¡¡him£»¡¡with¡¡the¡¡object¡¡of¡¡endeavouring¡¡to¡¡solve¡¡the

difficult¡¡problem¡¡of¡¡how¡¡to¡¡secure¡¡precise¡¡workmanship¡¡in

lock¡­making¡£¡¡¡¡But¡¡they¡¡could¡¡not¡¡solve¡¡it£»¡¡they¡¡saw¡¡that¡¡without

better¡¡tools¡¡the¡¡difficulty¡¡was¡¡insuperable£»¡¡and¡¡then¡¡Bramah¡¡began¡¡to

fear¡¡that¡¡his¡¡lock¡¡would¡¡remain¡¡a¡¡mere¡¡mechanical¡¡curiosity£»¡¡and¡¡be

prevented¡¡from¡¡coming¡¡into¡¡general¡¡use¡£



He¡¡was¡¡indeed¡¡sorely¡¡puzzled¡¡what¡¡next¡¡to¡¡do£»¡¡when¡¡one¡¡of¡¡the

hammermen¡¡in¡¡Moodie's¡¡shop¡¡ventured¡¡to¡¡suggest¡¡that¡¡there¡¡was¡¡a¡¡young

man¡¡in¡¡the¡¡Woolwich¡¡Arsenal¡¡smithy£»¡¡named¡¡Maudslay£»¡¡who¡¡was¡¡so

ingenious¡¡in¡¡such¡¡matters¡¡that¡¡¡¨nothing¡¡bet¡¡him£»¡¨¡¡and¡¡he¡¡recommended

that¡¡Mr¡£¡¡Bramah¡¡should¡¡have¡¡a¡¡talk¡¡with¡¡him¡¡upon¡¡the¡¡subject¡¡of¡¡his

difficulty¡£¡¡¡¡Maudslay¡¡was¡¡at¡¡once¡¡sent¡¡for¡¡to¡¡Bramah's¡¡workshop£»¡¡and

appeared¡¡before¡¡the¡¡lock¡­maker£»¡¡a¡¡tall£»¡¡strong£»¡¡comely¡¡young¡¡fellow£»

then¡¡only¡¡eighteen¡¡years¡¡old¡£¡¡¡¡Bramah¡¡was¡¡almost¡¡ashamed¡¡to¡¡lay¡¡his

case¡¡before¡¡such¡¡a¡¡mere¡¡youth£»¡¡but¡¡necessity¡¡constrained¡¡him¡¡to¡¡try

all¡¡methods¡¡of¡¡accomplishing¡¡his¡¡object£»¡¡and¡¡Maudslay's¡¡suggestions

in¡¡reply¡¡to¡¡his¡¡statement¡¡of¡¡the¡¡case¡¡were¡¡so¡¡modest£»¡¡so¡¡sensible£»

and¡¡as¡¡the¡¡result¡¡proved£»¡¡so¡¡practical£»¡¡that¡¡the¡¡master¡¡was

constrained¡¡to¡¡admit¡¡that¡¡the¡¡lad¡¡before¡¡him¡¡had¡¡an¡¡old¡¡head¡¡though

set¡¡on¡¡young¡¡shoulders¡£¡¡¡¡Bramah¡¡decided¡¡to¡¡adopt¡¡the¡¡youth's

suggestions£»¡¡made¡¡him¡¡a¡¡present¡¡on¡¡the¡¡spot£»¡¡and¡¡offered¡¡to¡¡give¡¡him

a¡¡job¡¡if¡¡he¡¡was¡¡willing¡¡to¡¡come¡¡and¡¡work¡¡in¡¡a¡¡town¡¡shop¡£¡¡¡¡Maudslay

gladly¡¡accepted¡¡the¡¡offer£»¡¡and¡¡in¡¡due¡¡time¡¡appeared¡¡before¡¡Bramah¡¡to

enter¡¡upon¡¡his¡¡duties¡£



As¡¡Maudslay¡¡had¡¡served¡¡no¡¡regular¡¡apprenticeship£»¡¡and¡¡was¡¡of¡¡a¡¡very

youthful¡¡appearance£»¡¡the¡¡foreman¡¡of¡¡the¡¡shop¡¡had¡¡considerable¡¡doubts

as¡¡to¡¡his¡¡ability¡¡to¡¡take¡¡rank¡¡alongside¡¡his¡¡experienced¡¡hands¡£¡¡¡¡But

Maudslay¡¡soon¡¡set¡¡his¡¡master's¡¡and¡¡the¡¡foreman's¡¡mind¡¡at¡¡rest¡£

Pointing¡¡to¡¡a¡¡worn¡­out¡¡vice¡­bench£»¡¡he¡¡said¡¡to¡¡Bramah£»¡¡¡¨Perhaps¡¡if¡¡I

can¡¡make¡¡that¡¡as¡¡good¡¡as¡¡new¡¡by¡¡six¡¡o'clock¡¡to¡­night£»¡¡it¡¡will¡¡satisfy

your¡¡foreman¡¡that¡¡I¡¡am¡¡entitled¡¡to¡¡rank¡¡as¡¡a¡¡tradesman¡¡and¡¡take¡¡my

place¡¡among¡¡your¡¡men£»¡¡even¡¡though¡¡I¡¡have¡¡not¡¡served¡¡a¡¡seven¡¡years'

apprenticeship¡£¡¨¡¡¡¡There¡¡was¡¡so¡¡much¡¡self¡­reliant¡¡ability¡¡in¡¡the

proposal£»¡¡which¡¡was¡¡moreover¡¡so¡¡reasonable£»¡¡that¡¡it¡¡was¡¡at¡¡once

acceded¡¡to¡£¡¡¡¡Off¡¡went¡¡Maudslay's¡¡coat£»¡¡up¡¡went¡¡his¡¡shirt¡¡sleeves£»¡¡and

to¡¡work¡¡he¡¡set¡¡with¡¡a¡¡will¡¡upon¡¡the¡¡old¡¡bench¡£¡¡¡¡The¡¡vice¡­jaws¡¡were

re¡­steeled¡¡¡¨in¡¡no¡¡time£»¡¨¡¡filed¡¡up£»¡¡re¡­cut£»¡¡all¡¡the¡¡parts¡¡cleaned¡¡and

made¡¡trim£»¡¡and¡¡set¡¡into¡¡form¡¡again¡£¡¡¡¡By¡¡six¡¡o'clock£»¡¡the¡¡old¡¡vice¡¡was

screwed¡¡up¡¡to¡¡its¡¡place£»¡¡its¡¡jaws¡¡were¡¡hardened¡¡and¡¡¡¨let¡¡down¡¨¡¡to

proper¡¡temper£»¡¡and¡¡the¡¡old¡¡bench¡¡was¡¡made¡¡to¡¡look¡¡so¡¡smart¡¡and¡¡neat

that¡¡it¡¡threw¡¡all¡¡the¡¡neighbouring¡¡benches¡¡into¡¡the¡¡shade£¡¡¡¡¡Bramah¡¡and

his¡¡foreman¡¡came¡¡round¡¡to¡¡see¡¡it£»¡¡while¡¡the¡¡men¡¡of¡¡the¡¡shop¡¡looked

admiringly¡¡on¡£¡¡¡¡It¡¡was¡¡examined¡¡and¡¡pronounced¡¡¡¨a¡¡first¡­rate¡¡job¡£¡¨

This¡¡diploma¡¡piece¡¡of¡¡work¡¡secured¡¡Maudslay's¡¡footing£»¡¡and¡¡next

Monday¡¡morning¡¡he¡¡came¡¡on¡¡as¡¡one¡¡of¡¡the¡¡regular¡¡hands¡£



He¡¡soon¡¡took¡¡rank¡¡in¡¡the¡¡shop¡¡as¡¡a¡¡first¡­class¡¡workman¡£¡¡¡¡Loving¡¡his

art£»¡¡he¡¡aimed¡¡at¡¡excellence¡¡in¡¡it£»¡¡and¡¡succeeded¡£¡¡¡¡For¡¡it¡¡must¡¡be

understood¡¡that¡¡the¡¡handicraftsman¡¡whose¡¡heart¡¡is¡¡in¡¡his¡¡calling£»

feels¡¡as¡¡much¡¡honest¡¡pride¡¡in¡¡turning¡¡out¡¡a¡¡piece¡¡of¡¡thoroughly¡¡good

workmanship£»¡¡as¡¡the¡¡sculptor¡¡or¡¡the¡¡painter¡¡does¡¡in¡¡executing¡¡a

statue¡¡or¡¡a¡¡picture¡£¡¡¡¡In¡¡course¡¡of¡¡time£»¡¡the¡¡most¡¡difficult¡¡and

delicate¡¡jobs¡¡came¡¡to¡¡be¡¡entrusted¡¡to¡¡Maudslay£»¡¡and¡¡nothing¡¡gave¡¡him

greater¡¡pleasure¡¡than¡¡to¡¡be¡¡set¡¡to¡¡work¡¡upon¡¡an¡¡entirely¡¡new¡¡piece¡¡of

machinery¡£¡¡¡¡And¡¡thus¡¡he¡¡rose£»¡¡naturally¡¡and¡¡steadily£»¡¡from¡¡hand¡¡to

head¡¡work¡£¡¡¡¡For¡¡his¡¡manual¡¡dexterity¡¡was¡¡the¡¡least¡¡of¡¡his¡¡gifts¡£¡¡¡¡He

possessed¡¡an¡¡intuitive¡¡power¡¡of¡¡mechanical¡¡analysis¡¡and¡¡synthesis¡£¡¡¡¡He

had¡¡a¡¡quick¡¡eye¡¡to¡¡perceive¡¡the¡¡arrangements¡¡requisite¡¡to¡¡effect

given¡¡purposes£»¡¡and¡¡whenever¡¡a¡¡difficulty¡¡arose£»¡¡his¡¡inventive¡¡mind

set¡¡to¡¡work¡¡to¡¡overcome¡¡it¡£



His¡¡fellow¡­workmen¡¡were¡¡not¡¡slow¡¡to¡¡recognise¡¡his¡¡many¡¡admirable

qualities£»¡¡of¡¡hand£»¡¡mind£»¡¡and¡¡heart£»¡¡and¡¡he¡¡became¡¡not¡¡only¡¡the

favourite£»¡¡but¡¡the¡¡hero¡¡of¡¡the¡¡shop¡£¡¡¡¡Perhaps¡¡he¡¡owed¡¡something¡¡to¡¡his

fine¡¡personal¡¡appearance¡£¡¡¡¡Hence¡¡on¡¡gala¡­days£»¡¡when¡¡the¡¡men¡¡turned¡¡out

in¡¡procession£»¡¡¡¨Harry¡¨¡¡was¡¡usually¡¡selected¡¡to¡¡march¡¡at¡¡their¡¡head

and¡¡carry¡¡the¡¡flag¡£¡¡¡¡His¡¡conduct¡¡as¡¡a¡¡son£»¡¡also£»¡¡was¡¡as¡¡admirable¡¡as

his¡¡qualities¡¡as¡¡a¡¡workman¡£¡¡¡¡His¡¡father¡¡dying¡¡shortly¡¡after¡¡Maudslay

entered¡¡Bramah's¡¡concern£»¡¡he¡¡was¡¡accustomed¡¡to¡¡walk¡¡down¡¡to¡¡Woolwich

every¡¡Saturday¡¡night£»¡¡and¡¡hand¡¡over¡¡to¡¡his¡¡mother£»¡¡for¡¡whom¡¡he¡¡had

the¡¡tenderest¡¡regard£»¡¡a¡¡considerable¡¡share¡¡of¡¡his¡¡week's¡¡wages£»¡¡and

this¡¡he¡¡continued¡¡to¡¡do¡¡as¡¡long¡¡as¡¡she¡¡lived¡£



Notwithstanding¡¡his¡¡youth£»¡¡he¡¡was¡¡raised¡¡from¡¡one¡¡post¡¡to¡¡another£»

until¡¡he¡¡was¡¡appointed£»¡¡by¡¡unanimous¡¡consent£»¡¡the¡¡head¡¡foreman¡¡of¡¡the

works£»¡¡and¡¡was¡¡recognised¡¡by¡¡all¡¡who¡¡had¡¡occasion¡¡to¡¡do¡¡business

there¡¡as¡¡¡¨Bramah's¡¡right¡­hand¡¡man¡£¡¨¡¡¡¡He¡¡not¡¡only¡¡won¡¡the¡¡heart¡¡of¡¡his

master£»¡¡butwhat¡¡proved¡¡of¡¡far¡¡greater¡¡importance¡¡to¡¡himhe¡¡also

won¡¡the¡¡heart¡¡of¡¡his¡¡master's¡¡pretty¡¡housemaid£»¡¡Sarah¡¡Tindel¡¡by¡¡name£»

whom¡¡he¡¡married£»¡¡and¡¡she¡¡went¡¡hand¡­in¡­hand¡¡with¡¡him¡¡through¡¡life£»¡¡an

admirable¡¡¡¨help¡¡meet£»¡¨¡¡in¡¡every¡¡way¡¡worthy¡¡of¡¡the¡¡noble¡¡character¡¡of

the¡¡great¡¡mechanic¡£¡¡¡¡Maudslay¡¡was¡¡found¡¡especially¡¡useful¡¡by¡¡his

master¡¡in¡¡devising¡¡the¡¡tools¡¡for¡¡making¡¡his¡¡patent¡¡locks£»¡¡and¡¡many

were¡¡the¡¡beautiful¡¡contrivances¡¡which¡¡he¡¡invented¡¡for¡¡the¡¡purpose¡¡of

ensuring¡¡their¡¡more¡¡accurate¡¡and¡¡speedy¡¡manufacture£»¡¡with¡¡a¡¡minimum

degree¡¡of¡¡labour£»¡¡and¡¡without¡¡the¡¡need¡¡of¡¡any¡¡large¡¡amount¡¡of¡¡manual

dexterity¡¡on¡¡the¡¡part¡¡of¡¡the¡¡workman¡£¡¡¡¡The¡¡lock¡¡was¡¡so¡¡delicate¡¡a

machine£»¡¡that¡¡the¡¡identity¡¡of¡¡the¡¡several¡¡parts¡¡of¡¡which¡¡it¡¡was

composed¡¡was¡¡found¡¡to¡¡be¡¡an¡¡absolute¡¡necessity¡£¡¡¡¡Mere¡¡handicraft£»

however¡¡skilled£»¡¡could¡¡not¡¡secure¡¡the¡¡requisite¡¡precision¡¡of

workmanship£»¡¡nor¡¡could¡¡the¡¡parts¡¡be¡¡turned¡¡out¡¡in¡¡sufficient¡¡quantity

to¡¡meet¡¡any¡¡large¡¡demand¡£¡¡¡¡It¡¡was¡¡therefore¡¡requisite¡¡to¡¡devise

machine¡­tools¡¡which¡¡should¡¡not¡¡blunder£»¡¡nor¡¡turn¡¡out¡¡imperfect

work£»¡¡machines£»¡¡in¡¡short£»¡¡which¡¡should¡¡be¡¡in¡¡a¡¡great¡¡measure

independent¡¡of¡¡the¡¡want¡¡of¡¡dexterity¡¡of¡¡individual¡¡workmen£»¡¡but¡¡which

should¡¡unerringly¡¡labour¡¡in¡¡their¡¡prescribed¡¡track£»¡¡and¡¡do¡¡the¡¡work

set¡¡them£»¡¡even¡¡in¡¡the¡¡minutest¡¡details£»¡¡after¡¡the¡¡methods¡¡designed¡¡by

their¡¡inventor¡£¡¡¡¡In¡¡this¡¡department¡¡Maudslay¡¡was¡¡eminently¡¡successful£»

and¡¡to¡¡his¡¡laborious¡¡ingenuity£»¡¡as¡¡first¡¡displayed¡¡in¡¡Bramah's

workshops£»¡¡and¡¡afterwards¡¡in¡¡his¡¡own¡¡establishment£»¡¡we¡¡unquestionably

owe¡¡much¡¡of¡¡the¡¡power¡¡and¡¡accuracy¡¡of¡¡our¡¡present¡¡self¡­acting

machines¡£



Bramah¡¡himself¡¡was¡¡not¡¡backward¡¡in¡¡admitting¡¡that¡¡to¡¡Henry¡¡Maudslay's

practical¡¡skill¡¡in¡¡contriving¡¡the¡¡machines¡¡for¡¡manufacturing¡¡his

locks¡¡on¡¡a¡¡large¡¡scale£»¡¡the¡¡success¡¡of¡¡his¡¡invention¡¡was¡¡in¡¡a¡¡great

degree¡¡attributable¡£¡¡¡¡In¡¡further¡¡proof¡¡of¡¡his¡¡manual¡¡dexterity£»¡¡it¡¡may

be¡¡mentioned¡¡that¡¡he¡¡constructed¡¡with¡¡his¡¡own¡¡hands¡¡the¡¡identical

padlock¡¡which¡¡so¡¡severely¡¡tested¡¡the¡¡powers¡¡of¡¡Mr¡£¡¡Hobbs¡¡in¡¡1851¡£¡¡¡¡And

when¡¡it¡¡is¡¡considered¡¡that¡¡the¡¡lock¡¡had¡¡been¡¡made¡¡for¡¡more¡¡than¡¡half

a¡¡century£»¡¡and¡¡did¡¡not¡¡embody¡¡any¡¡of¡¡the¡¡modern¡¡improvements£»¡¡it¡¡will

perhaps¡¡be¡¡regarded¡¡not¡¡only¡¡as¡¡creditable¡¡to¡¡the¡¡principles¡¡on¡¡which

it¡¡was¡¡constructed£»¡¡but¡¡to¡¡the¡¡workmanship¡¡of¡¡its¡¡maker£»¡¡that¡¡it

should¡¡so¡¡long¡¡have¡¡withstood¡¡the¡¡various¡¡mechanical¡¡dexterity¡¡to

which¡¡it¡¡was¡¡exposed¡£



Besides¡¡the¡¡invention¡¡of¡¡improved¡¡machine¡­tools¡¡for¡¡the¡¡manufacture

of¡¡locks£»¡¡Maudslay¡¡was¡¡of¡¡further¡¡service¡¡to¡¡Bramah¡¡in¡¡applying¡¡the

expedient¡¡to¡¡his¡¡famous¡¡Hydraulic¡¡Press£»¡¡without¡¡which¡¡it¡¡would

probably¡¡have¡¡remained¡¡an¡¡impracticable¡¡though¡¡a¡¡highly¡¡ingenious

machine¡£¡¡¡¡As¡¡in¡¡other¡¡instances¡¡of¡¡great¡¡inventions£»¡¡the¡¡practical

success¡¡of¡¡the¡¡whole¡¡is¡¡often¡¡found¡¡to¡¡depend¡¡upon¡¡the¡¡action¡¡of¡¡some

apparently¡¡trifling¡¡detail¡£¡¡¡¡This¡¡was¡¡especially¡¡the¡¡case¡¡with¡¡the

hydraulic¡¡press£»¡¡to¡¡which¡¡Maudslay¡¡added¡¡the¡¡essential¡¡feature¡¡of¡¡the

self¡­tightening¡¡collar£»¡¡above¡¡described¡¡in¡¡the¡¡memoir¡¡of¡¡Bramah¡£¡¡¡¡Mr¡£

James¡¡Nasmyth¡¡is¡¡our¡¡authority¡¡for¡¡ascribing¡¡this¡¡invention¡¡to

Maudslay£»¡¡who¡¡was¡¡certainly¡¡quite¡¡competent¡¡to¡¡have¡¡made¡¡it£»¡¡and¡¡it

is¡¡a¡¡matter¡¡of¡¡fact¡¡that¡¡Bramah's¡¡specification¡¡of¡¡the¡¡press¡¡says

nothing¡¡of¡¡the¡¡hollow¡¡collar£»*

¡¡£§footnote¡£¡£¡£

The¡¡words¡¡Bramah¡¡uses¡¡in¡¡describing¡¡this¡¡part¡¡of¡¡his¡¡patent¡¡of¡¡1795

are¡¡these¡¨The¡¡piston¡¡must¡¡be¡¡made¡¡perfectly¡¡watertight¡¡by¡¡leather

or¡¡other¡¡materials£»¡¡as¡¡used¡¡in¡¡pump¡­making¡£¡¨¡¡¡¡He¡¡elsewhere¡¡speaks¡¡of

the¡¡piston¡­rod¡¡¡¨working¡¡through¡¡the¡¡stuffing¡­box¡£¡¨¡¡¡¡But¡¡in¡¡practice£»

as¡¡we¡¡have¡¡above¡¡shown£»¡¡these¡¡methods¡¡were¡¡found¡¡to¡¡be¡¡altogether

inefficient¡£

¡¡¡£¡£¡££§

on¡¡which¡¡its¡¡efficient¡¡action¡¡mainly¡¡depends¡£¡¡¡¡Mr¡£¡¡Nasmyth

says¡¨Maudslay¡¡himself¡¡told¡¡me£»¡¡or¡¡led¡¡me¡¡to¡¡believe£»¡¡that¡¡it¡¡was¡¡he

who¡¡invented¡¡the¡¡self¡­tightening¡¡collar¡¡for¡¡the¡¡hydraulic¡¡press£»

without¡¡which¡¡it¡¡would¡¡never¡¡have¡¡been¡¡a¡¡serviceable¡¡machine¡£¡¡¡¡As¡¡the

self¡­tightening¡¡collar¡¡is¡¡to¡¡the¡¡hydraulic¡¡press£»¡¡so¡¡is¡¡the

steamblast¡¡to¡¡the

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