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men of invention and industry-第24章

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recompense for the time spent by him for the general good of

mankind。〃  This grateful attention was all the more praiseworthy;

as Sardinia could not in any way be regarded as a great maritime

power。



Harrison was now becoming old and feeble。  He had attained the

age of seventy…four。  He had spent forty long years in working

out his invention。  He was losing his eyesight; and could not

afford to wait much longer。  Still he had to wait。



〃Full little knowest thou; who hast not tried; 

What hell it is in suing long to bide; 

To lose good days; that might be better spent; 

To waste long nights in pensive discontent; 

To spend to…day; to be put back to…morrow; 

To feed on hope; to pine with fear and sorrow。〃



But Harrison had not lost his spirit。  On May 30th; 1765; he

addressed another remonstrance to the Board; containing much

stronger language than he had yet used。  〃I cannot help

thinking;〃 he said; 〃that I am extremely ill…used by gentlemen

from whom I might have expected a different treatment; for; if

the Act of the l2th of Queen Anne be deficient; why have I so

long been encouraged under it; in order to bring my invention to

perfection?  And; after the completion; why was my son sent twice

to the West Indies?  Had it been said to my son; when he received

the last instruction; 'There will; in case you succeed; be a new

Act on your return; in order to lay you under new restrictions;

which were not thought of in the Act of the l2th of Queen Anne;'

I say; had this been the case; I might have expected some such

treatment as that I now meet with。



〃It must be owned that my case is very hard; but I hope I am the

first; and for my country's sake I hope I shall be the last; to

suffer by pinning my faith upon an English Act of Parliament。 

Had I received my just rewardfor certainly it may be so called

after forty years' close application of the talent which it has

pleased God to give methen my invention would have taken the

course which all improvements in this world do; that is; I must

have instructed workmen in its principles and execution; which I

should have been glad of an opportunity of doing。  But how widely

different this is from what is now proposed; viz。; for me to

instruct people that I know nothing of; and such as may know

nothing of mechanics; and; if I do not make them understand to

their satisfaction; I may then have nothing!



〃Hard fate indeed to me; but still harder to the world; which may

be deprived of this my invention; which must be the case; except

by my open and free manner in describing all the principles of it

to gentlemen and noblemen who almost at all times have had free

recourse to my instruments。  And if any of these workmen have

been so ingenious as to have got my invention; how far you may

please to reward them for their piracy must be left for you to

determine; and I must set myself down in old age; and thank God I

can be more easy in that I have the conquest; and though I have

no reward; than if I had come short of the matter and by some

delusion had the reward!〃



The Right Honourable the Earl of Egmont was in the chair of the

Board of Longitude on the day when this letter was readJune 13;

1765。  The Commissioners were somewhat startled by the tone which

the inventor had taken。  Indeed; they were rather angry。  Mr。

Harrison; who was in waiting; was called in。  After some rather

hot speaking; and after a proposal was made to Harrison which he

said he would decline to accede to 〃so long as a drop of English

blood remained in his body;〃 he left the room。  Matters were at

length arranged。  The Act of Parliament (5 Geo。 III。 cap。 20)

awarded him; upon a full discovery of the principles of his

time…keeper; the payment of such a sum; as with the 2500L。 he had

already received; would make one half of the reward; and the

remaining half was to be paid when other chronometers had been

made after his design; and their capabilities fully proved。  He

was also required to assign his four chronometersone of which

was styled a watchto the use of the public。



Harrison at once proceeded to give full explanations of the

principles of his chronometer to Dr。 Maskelyne; and six other

gentlemen; who had been appointed to receive them。  He took his

timekeeper to pieces in their presence; and deposited in their

hands correct drawings of the same; with the parts; so that other

skilful makers might construct similar chronometers on the same

principles。  Indeed; there was no difficulty in making them;

after his explanations and drawings had been published。  An exact

copy of his last watch was made by the ingenious Mr。 Kendal; and

was used by Captain Cook in his three years' circumnavigation of

the world; to his perfect satisfaction。



England had already inaugurated that series of scientific

expeditions which were to prove so fruitful of results; and to

raise her naval reputation to so great a height。  In these

expeditions; the officers; the sailors; and the scientific men;

were constantly brought face to face with unforeseen difficulties

and dangers; which brought forth their highest qualities as men。 

There was; however; some intermixture of narrowness in the minds

of those who sent them forth。  For instance; while Dr。 Priestley

was at Leeds; he was asked by Sir Joseph Banks to join Captain

Cook's second expedition to the Southern Seas; as an astronomer。 

Priestley gave his assent; and made arrangements to set out。  But

some weeks later; Banks informed him that his appointment had

been cancelled; as the Board of Longitude objected to his

theology。  Priestley's otherwise gentle nature was roused。  〃What

I am; and what they are; in respect of religion;〃 he wrote to

Banks; in December; 1771; 〃might easily have been known before

the thing was proposed to me at all。  Besides; I thought that

this had been a business of philosophy; and not of divinity。  If;

however; this be the case; I shall hold the Board of Longitude in

extreme contempt。〃



Captain Cook was appointed to the command of the Resolution; and

Captain Wallis to the command of the Adventure; in November;

1771。  They proceeded to equip the ships; and amongst the other

instruments taken on board Captain Cook's ship; were two

timekeepers; one made by Mr。 Larcum Kendal; on Mr。 Harrison's

principles; and the other by Mr。 John Arnold; on his own。  The

expedition left Deptford in April; 1772; and shortly afterwards

sailed for the South Seas。  〃Mr。 Kendal's watch〃 is the subject

of frequent notices in Captain Cook's account。  At the Cape of

Good Hope; it is said to have 〃answered beyond all expectation。〃

Further south; in the neighbourhood of Cape Circumcision; he

says; 〃the use of the telescope is found difficult at first; but

a little practice will make it familiar。  By the assistance of

the watch we shall be able to discover the greatest error this

method of observing the longitude at sea is liable to。〃  It was

found that Harrison's watch was more correct than Arnold's; and

when near Cape Palliser in New Zealand; Cook says; 〃this day at

noon; when we attended the winding…up of the watches; the fusee

of Mr。 Arnold's would not turn round; so that after several

unsuccessful trials we were obliged to let it go down。〃  From

this time; complete reliance was placed upon Harrison's

chronometer。  Some time later; Cook says; 〃I must here take

notice that our longitude can never be erroneous while we have so

good a guide as Mr。 Kendal's watch。〃  It may be observed; that at

the beginning of the voyage; observations were made by the lunar

tables; but these; being found unreliable; were eventually

discontinued。



To return to Harrison。  He continued to be worried by official

opposition。  His claims were still unsatisfied。  His watch at

home underwent many more trials。  Dr。 Maskelyne; the Royal

Astronomer; was charged with being unfavourable to the success of

chronometers; being deeply inte

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